Growing Cannabis From Seed Outdoors


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Learn how to grow feminized cannabis seeds outdoors, all of the tips and tricks needed for a successful grow. Growing cannabis outdoors has been mans traditional method of growing his favourite recreational and medicinal herb for thousands of years. Discover the 10 most common mistakes made when growing cannabis outdoors and how to avoid them and become a pro.

How to Grow Feminized Cannabis Seeds Outdoors

When it comes to growing cannabis, one of the best ways to harvest quality and quantity is via feminized seeds and by following our advice. If you want to know more, keep reading!

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Most seed Banks have a selection of feminized cannabis seeds and many of them can be grown outdoors unless the manufacturer indicates otherwise.

Feminized cannabis seeds allow you to guarantee female plants, which are the ones that produce buds and the most planted type of cannabis seed. On the other hand, regular seeds produce both male and female cannabis plants and growing them takes more work.

How to Choose Feminized Cannabis Seeds for Outdoors

Nowadays it’s possible to buy high quality feminized cannabis seeds that are easy to grow. These seeds can guarantee a decent harvest at affordable prices, considering the extra expenses involved in obtaining high quality cannabis in a dispensary or by other means.

There are certain factors you’ll need to keep in mind when it comes to choosing the right feminized seeds for outdoor growing.

Size of the Strain

Feminized cannabis strains grown outdoors can grow quite large and produce large yields when given enough time to grow and the proper care. Sativa-dominant strains tend to grow a lot bigger and taller than indica-dominant strains.

If you need a discreet strain for a small area such as a balcony, you’ll need to make sure the strain isn’t going to grow too big. If height and discretion aren’t an issue, you can always train, prune, plant later or plant autoflowering seeds. These last ones produce high yields and slightly less quality than feminized light-dependent strains. Feminized cannabis plants outdoors.

When to Harvest Outdoors

Cannabis plants outdoors must deal with insects, possible fungi and sometimes, bad weather. Therefore an early harvest is a great way to avoid these issues, as well as keeping insects and fungi from having enough time to do damage to your plants. Nowadays there are many different fast-flowering strains such as Critical King (hybrid) and Jamaican Dream (sativa), which have been extremely popular in outdoor grows all around the world.

Things to Keep in Mind When Choosing Feminized Seeds

As well as these factors, you can also choose your seeds depending on the type of effect that they produce (stimulating, relaxing, balanced), as well as different aromas and flavours and other factors such as genetics or cannabinoid proportion.

These last few factors are more personal; we recommend starting off with the size of your grow as a basis for your strain choice, making sure that you keep in mind harvesting times too. Later on, you can narrow it down to other characteristics.

How to Grow Feminized Cannabis Seeds Outoors

In the following section we’ll go over, stage by stage, how to grow feminized cannabis seeds outdoors.

General advice for growing feminized cannabis seeds

  • Whenever you can use white flowerpots or smart pots; this allows for your plants’ roots to grow out more and cooler, while also feeding more.
  • Excess heat can cause your plants to begin consuming nutrients stored in their leaves, causing nasty symptoms and colours.
  • Protect your plants right from the start using natural preventive products such as neem oil, or using bio or chemical insecticides and fungicides if you already have an infestation.
  • Make sure to keep in mind the seed bank’s recommendations in regard to when to harvest and the plants’ nutritional needs – make the most of your strain.
  • Choose your flowerpot sizes based on the amount of space that you have; make sure not to place too many plants, they need enough space to grow out properly.
  • Whenever you water, check and adjust the pH in your water as needed. Also, if possible, you should also check EC levels. If you need more information about watering your plants, you can check out our post how to water cannabis plants.
  • If you use tap water or give your plants a lot of nutrients you should get used to using enzymes in order to get rid of unwanted salts and dead roots.
  • When it comes to growing in flowerpots, use nutrients in liquid format – they are absorbed rapidly and allow for more control over dosages.
  • On the other hand, if you’re growing out in the ground, you should used powdered fertilizers which cover more space and are slow-releasing.
    Make sure to keep the flowerpots up off the ground to allow for more airflow and so that the heat from the ground doesn’t reach the roots.
  • During the summer, keep in mind that temperatures rise, and evaporation is faster when watering plants. The hotter it is, the more moisture evaporates; you’ll need to water more often, although if you keep fertilizing as usual you can easily cause overfertilization. We recommend using the same amount of nutrients as always, divided into more feedings, or using more enzymes.

Germinating Seeds

Germination involves the seed changing from inactive, to a seedling. It can take just over 24h or even up to 7 days for seeds to germinate, depending on the strain, the germination conditions, how they’re stored and the state of the seeds.

In order to guarantee healthy germination and proper rooting before the growth stage, we recommend germinating your seeds separately and once they’ve become saplings, place them in their first flowerpot. If you need more information about germinating cannabis seeds, you can check out our post on how to germinate cannabis seeds.

Planting cannabis seeds after germination

Once your cannabis seeds have been germinated, you’ll need to plant them in their first flowerpot. Once your plant has around 1cm of roots, it can be planted – we recommend starting with a small pot, around 0.2 – 0.4L, with an airy, high-quality substrate. Before planting, moisten the substrate and make a small hole for placing the root.

During the first days, we recommend keeping plants in a propagator, inside with direct light, or in a growth grow tent indoors. We recommend keeping them protected until the first 4 leaves have developed and they can begin growing properly.

We also highly recommend using some sort of root stimulant such as Rootfast in order to increase root growth, as well as Trichoderma and mycorrhizae like Top Crop Micro Vita in order to protect and stimulate plant growth. Cannabis plant with three cotyledon leaves during the first growing days.


As your plants grow, their roots will begin taking over the substrate. There will come a point when your plants’ roots will end up filling up the substrate and growth will stop. Your plants might even end up with certain deficiencies when this happens as they won’t be able to find enough nutrients in the soil, and they’ll begin absorbing nutrients from their leaves.

In order to prevent this you’ll need to transplant periodically, moving your cannabis plants to larger flowerpots until right before the flowering stage. Every time you transplant, we recommend using a rooting stimulant, as well as mycorrhizae and Trichoderma as we mentioned earlier.

Keep in mind that the bigger the flowerpot, the larger the size of your plants and the larger the yield – so you’ll need to plan out your growing area accordingly. If you’re growing in the ground, we recommend transplanting from your flowerpot to the ground once they’re around 15 – 20cm tall; this allows it to grow more robust.

If you need more information on transplants, you can check out our post; when and how to transplant cannabis plants. Cannabis plants growing outdoors after a transplant.

Growth/vegetative stage

Feminized light-dependent cannabis plants grow until adulthood (around 30 days). They’ll keep growing as long as they don’t get less hours of light. If you grow outside of the right season, your plants will grow for around a month and then they’ll start their flowering stage.

This is why we recommend growing feminized cannabis seeds towards the start of the season; if you want, you can also harvest again towards mid-summer. We recommend planting feminized seeds over autoflowering seeds, as they offer larger yields and quality.

Growing cannabis outdoors

Growing cannabis outdoors has been mans traditional method of growing his favourite recreational and medicinal herb for thousands of years.

Nature has provided cannabis with the adaptations and toughness needed to grow in many regions. Specialist selective breeding by the more professional cannabis seed suppliers has produced some truly outstanding varieties that will produce excellent cannabis in non-tropical northern European climates and even thousands of metres above sea level.

For those growers that don’t wish to grow cannabis indoors or in greenhouses, outdoor growing is a great and easy way to produce your stash. Growing cannabis outdoors with good quality feminized cannabis seed not only gives amazingly powerful weed but it also produces some of the best tasting cannabis with deep flavours and rich aromas.

What is important to know

How to choose an outdoor or garden growing spot?

For some people, outdoor growing means a secure and private part of their back garden or even a balcony. In some parts of the world this is too risky, so growers will choose a private and often remote spot in the countryside where they can grow their cannabis seeds.

Internet maps or local knowledge can be used to find private sun-facing locations. It’s very important that you put your plant in a spot with as many sun hours as possible. Also check if there is any moss growing near the spot you wish to grow. Moss is often an indication for an abundance of moisture, which can give you mold troubles during flowering.

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Is your chosen grow location a windy spot or not? While some wind can help strengthen the stems and plant itself, too much wind will damage the plant, restrict growth rates and can cause them to die early. Not enough wind in an enclosed environment can also cause troubles with humidity because of still air, so choose wisely. Many growers like to have a few different grow locations, spreading the risk.

Growing outdoor cannabis seeds

Selecting your location

Which type of soil do you have at your grow location? Is it possible to carry your own soil to the location? If the location is too remote to allow you to carry your own soil you will need to consider if you can work with the soil which is available. If the soil at your chosen grow location is just too sandy or has too much clay you may struggle to grow.

Is there water available nearby? If you are in a hot and dry climate it is always preferred to grow near a river, lake or stream. This allows easy access to water in hot conditions.

Can other people see your plants? Privacy is key if you want a successful harvest. When growing in your own garden it is recommended to keep plants low so neighbours or people that pass by can’t actually see the plants. It’s a risk you should avoid. If people can see cannabis plants, it’s usually just a matter of time before problems start. Often people call the police or steal the crop themselves.

SCROG grow technique

Growing autoflowers (which often stay around a metre in height) or using grow techniques like an outdoor SCROG to reduce the height of the plants are both popular with outdoor growers using their own garden. When growing guerrilla style, it is very important to protect your plants from the eye of unwanted visitors. Many that see your plants will wait until it is almost time to harvest and steal your plants before you can put your scissors to good use.

Those growing outdoors on their own land should be able to ensure that the plants receive all the water and nutrients that they need. This should guarantee the very best results assuming they originally invested in quality feminized cannabis seeds or autoflower seeds.

Those lucky enough to live in a Mediterranean climate with a private sun terrace are ideally placed for easy outdoor cannabis growing.

How do I select the perfect outdoor cannabis seed variety?

Step 1

Which climate are you in? Northern European climate, Mediterranean? Desert or Jungle? Select the right variety that is most suitable for your environment with a bloom time which works for your climate..

Step 2

Are you growing them in your own garden or guerrilla style? Some plants will be more suitable for guerrilla farming. Dutch Passion Hollands Hope for example was developed to be grown in the corn fields to become mature and ready to be cut faster than the corn that was grown by the farmer.

Other Dutch Passion outdoor cannabis seed varieties, like Frisian Dew, Passion #1 and Durban Poison are real outdoor champions. They will do well both in guerrilla style grows as well as the garden, because they have vigorous growth and better resistance to mould and fungus.

Autoflowers need to be checked more regularly because of their short, accelerated growing cycle. They benefit from a little more protection more than traditional photoperiod strains, which have 2-4 months just for vegetive growth. Where possible, regular visits to your outdoor autoflowers allows you to keep on top of small pest outbreaks, nutrient & water issues etc.

Step 3

What type of plant are you looking for? A big yielding plant? A certain type of high? Type of flavor? Does the strain need to be short? Will it cause visibility problems if the plant gets too tall? You may wish to keep your plant below a certain height to prevent others from seeing it.

If so, don’t grow Sativa dominant fem varieties, choose Indica’s, Indica-dominant hybrids or grow strictly autoflowers if you want them below 1.50 – 1.75m. Choose wisely. A stretchy Sativa variety can easily reach 3m tall and will be visible from some distance.

When growing cannabis outdoors think carefully about the variety. Not all strains are suited to outdoors, so read the reviews carefully and choose a good seed supplier. The best outdoor strains for Northern-Western Europe (or similar climates) were often developed over a period of several years, selectively breeding those offspring that displayed the best suitability to outdoor conditions as well as retaining premium potency levels.

This is a full time job that requires an expert ability not just to create premium outdoor strains but also to stabilise them. Some good examples are the best selling outdoor varieties Frisian Dew®. Hollands Hope®, Passion#1® and Durban Poison®.

You can also choose one of the autoflowers, which are all suitable for growing outdoors during spring and summer.

When can I start growing cannabis outdoors?

It’s important to place your cannabis plants outside after the last frost. That’s because young seedlings struggle to survive if planted out too early. Starting around the middle of May is generally a safe option for northern European growers. The outdoor grower typically grows from April/May to October in the northern hemisphere.

Outdoor growers often germinate the cannabis seeds indoors and give their plants a head-start by growing them indoors under lights for a few weeks with an 18/6 or 20/4 light schedule. Outdoor cannabis growers often acclimatise their plants to outdoor temperatures gradually before permanently planting them outdoors. This allow the plants to adapt slowly from indoor conditions to outdoor life.

It’s also possible for northern European growers to start growing cannabis outdoors around the beginning of April with the help of a greenhouse or polytunnel. This will help protect the plants from the worst of the early season weather. In mediterranean climates the growing season is longer and more varieties can be successfully grown. Growers in the southern hemisphere often grow cannabis outdoors from October to April.

When can I harvest my outdoor cannabis?

Harvest times given on this website are for the Dutch climate and latitude. Most outdoor varieties you can find in the ‘Dutch Outdoor‘ selection on our website. All our outdoor feminized cannabis seed varieties are carefully selected, developed and bred in Holland. This makes them very suitable to grow in the Dutch climate (or similar), which can be very wet and cold from time to time.

Important for these varieties is that they finish flowering early in the year. Good examples are varieties like Frisian Dew®. Hollands Hope®, Passion#1® and Durban Poison®. You can harvest these outdoor varieties from around the end of September until late October. Because the genetics of these outdoor varieties have been bred to handle bad weather conditions, in combination with an early finish, they are perfect for outdoor growing in Northern latitudes.

Many outdoor cannabis growers with short growing seasons grow feminized autoflower seeds. These grow from seed to harvest in around 100 days outdoors, the shorter life cycle of the autoflowering cannabis varieties makes them a good choice for outdoor growers.

With autoflower seeds it is possible to grow 2 successive crops in one outdoor growing season, (or even 3 in warm sunny Mediterranean conditions) but you need to prepare and time it well.

Can I grow ‘indoor’ cannabis seed varieties outdoor as well?

All “indoor” and “outdoor” cannabis seed varieties can be grown outdoors at warmer latitudes. For this reason, the harvest time under natural light is also given for all the “indoor” varieties.

Greenhouse seed varieties and indoor varieties can be grown outdoors in Central and Southern Europe with very good results. In more Northern latitudes (Scandinavia, UK etc) only the outdoor varieties that are harvested early can be grown outdoors. Frisian Dew is particularly well regarded by northern European growers.

Growing cannabis outdoors with the best autoflower seeds

Many growers at extreme northern/southern latitudes find that autoflower seeds are the best option for a short growing season. Many dedicated ‘Indoor’ varieties simply finish flowering much too late. This increases the risk of bad weather conditions destroying your harvest.

A Haze variety which would finish outdoor bloom in November may be possible to grow in southern Spain, but it would be unsuitable for central or northern Europe. Most “outdoor” varieties cannot be grown indoors as well, unless mentioned in the variety description.

Grow in pots or directly into the soil?

Those growing on their own land may have the option of growing the cannabis plants in plant pots or rooting them directly into the soil. Plant pots have the advantage of being portable but will need regular watering in hot weather. Putting your plant in a pot also allows the user to place and relocate the plant into a sunny spot when needed.

The experienced grower will often avoid ‘black’ plant containers which get very hot in direct sunlight. They will also avoid putting plant pots directly onto a hot surface (e.g. tiled terrace) which will stress the roots.

Bigger pots for oudoor grows

When growing outdoors in pots it is recommended to use bigger pots than usual. For photoperiod plants you can use pots from 50litres upwards to a few hundred litres if you want to grow Californian style monsters.

For outdoor autoflowers use anywhere between 20 – 50 litre containers. The longer the autoflowers grow, the bigger the pot needs to be. The extra soil in the pot will create a bufferzone to prevent the soil from completely drying out. Even though most autoflowers will not fill the 50L pot completely with roots, the pot itself will hold more moisture than a 10L pot. This increases your chance of success and reduces the chance of plants struggling due to lack of water. Make sure to use a well-aerated pot like Autopot, Rootpouch or Smartpot for the best results.

Growing in pots gives you more control (as described above) and provides the plants with more air/oxygen at the root zone which stimulates faster and healthier growth.

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Furthermore rain water will flush plants that are grown in pots more than plants which are rooted into the ground. This gives the grower a better control of nutrients when growing plants in containers.

What should I look for when growing outside? (Guerrilla cannabis grow)

One of the most important factors for the outdoor grower is to correctly identify and prepare the site. Your cannabis seeds are valuable, so it’s well worth taking extra time to check and evaluate plenty of possible grow sites.

The ideal grow site should get unrestricted sun for as much of the day as possible. Protection from strong winds will also shield your crop. A grow site will often benefit from shelter; a small earth bank, a fallen tree stem or thick bushes can not only protect the plant from prevailing winds but it may also protect the plant from animals and unwelcome human attention.

Having a close source of water, such as a nearby stream can make it easy to get water to your crop during hot weather.

How do I pick a private safe spot for my outdoor grow?

Those growing outdoors may not always be able to visit the plants regularly so a grow spot has to be chosen which is private, sunny and with some protection from animals such as rabbits and deer that will eat the cannabis. Some growers surround their secret grow spot with branches and undergrowth to conceal the crop and deter grazing animals.

Other growers deliberately plant thorny plants (blackberry plants etc) around their grow area to provide lasting and effective protection. This technique usually involves systematically surrounding the grow patch with a thick, tall and impenetrable barrier to humans and animals

How do I protect my outdoor guerrilla plant?

Those growing outdoors may not always be able to visit the plants regularly so a grow spot has to be chosen which is private, sunny and with some protection from animals such as rabbits and deer that will happily munch the plants if not kept away.

Some growers surround their secret cannabis grow spot with branches and undergrowth to conceal the crop and deter grazing animals. Other growers deliberately plant thorny plants (blackberry plants etc) around their grow area to provide lasting and effective protection. This technique usually involves systematically surrounding the grow patch with a thick, tall and impenetrable barrier to humans and animals. When done properly there is absolutely no way that anyone could guess cannabis plants are growing nearby.

Often the only way into the centre of such a grow is by crawling along the ground through a single secure route that can be easily covered and hidden.

A good tip for outdoor growers is to surround the plants with chicken wire, or a similar green garden wire. This helps keep animals away from the young and vulnerable plants. Once the plants are larger they become more difficult to be eaten.

How do I prepare the soil for the cannabis seeds?

Many outdoor growers will use organic fertilisers such as bat guano, worm castings, bloodmeal, bonemeal etc to improve soil condition before the grow starts, perhaps digging in plenty of compost as well. More proficient outdoor growers will test the soil when preparing the site and fertilise it accordingly. Professional soil testing kits can be bought from garden centres which will indicate the soil type, the pH and factors such as sand content, loam and clay content etc. There is no ‘perfect’ soil for growing in and different varieties will often perform well in a range of conditions so long as nutrients are present, drainage is good and pH is within 5.8-6.5.

Growing cannabis seeds outdoors organically

These days many outdoor growers often have a preference to grow organically, avoiding chemical pesticides, additive and fertilisers where possible. BioTabs are a nutrient company who specialise in making grow additives from entirely natural materials. A full range of products are available. One of the most popular products are the palm-sized general fertilizer tablets.

BioTabs take plant root health very seriously, the products contain beneficial bacteria which create a healthy root zone as well as supplying all the required minerals for healthy plant growth. Just place a few of the tablets in and around the root zone.

Many growers dig a hole somewhere between 5-100 litres. Often they will fill this with a high quality pre-made soil from the garden centre/grow-shop. The plant (and supplementary BioTab nutrient tablets) are just placed in the hole and then watered.

For most growers it isn’t necessary to test soil pH, but professional growers with large crops and a business to run will take soil quality very seriously.

Helpful tips for preparing the soil

Visits to the grow spot will often involve checking the plants for pests and treating them accordingly. In dry weather water may need bringing to the plants. Some outdoor growers transport their own soil to the grow site, often it will have been pre-enriched with e.g. worm castings and perhaps water absorbent gel crystals will have been added.

Water absorbent gel crystals can be bought in many garden centres and absorb excess moisture swelling into large water retaining gel particles. These then slowly release the water during dryer times. They allow plants to thrive with additional water reserves for their roots even in drought conditions.

It is crucial to keep the soil in the best condition possible for the plants. This allows the plants to grow in optimized conditions, and gives you the best chance of producing the best results from your cannabis seeds. Some growers mix coco fibre in with the soil, this increases aeration and is particularly useful if the soil is heavy with a high clay content.

As previously mentioned, BioTabs produce compressed nutrient tablets which slowly release all necessary nutrients into the soil throughout the full grow cycle of the cannabis plant. BioGrow are another proven nutrient provider for outdoor growers. As well as releasing nutrients, BioTabs also produce a healthy microbiological root zone for the plants.

Check the soil doesn’t become too dry during summer. Your plants will need moist nutritious soil to reach their full potential. Although it isn’t absolutely critical to offer your outdoor plants supplementary nutrition, many experienced outdoor growers like to monitor their plants through the complete grow cycle and will add extra nutrition to the soil when they feel it necessary. The best quality outdoor cannabis seeds will produce exceptional results in optimized soil/environmental conditions.

Growing cannabis in the canopy of a tree

Some growers prefer the seclusion remote forests, woods or mountains for complete peace-of-mind and security. A new technique is to grow cannabis plants in large soil-filled sacks that have been hoisted into the tree canopy.

This technique allows growers to choose locations that may be closer to home since the plants are completely invisible to people passing nearby. Plants grown in this way benefit from all-day sunlight and can be grown relatively close to cities and villages without raising suspicion. Just make sure that the sack is securely fixed in place.

Please note that this method does not allow a grower to keep close track of their grow and comes with certain risks of getting your plants where they need to be.

Outdoor growing can be challenging but fun

Sometimes the hardest part of outdoor growing is selecting the right location and preparing it for the cannabis plants/seeds. Often the outdoor grower will have several different grow locations and accepts that losing the occasional plant is an occupational hazard.

Once the spot is ready it will often be used for many years of harvesting by the outdoor cannabis grower. Outdoor growing is challenging but fun, it may require ingenious thinking and professional preparation but when done correctly the outdoor grower can experience the thrill and satisfaction from harvesting all his herbal supplies free of charge, the way nature intended.

A well planned outdoor grow deserves fully proven genetics. Dutch Passion have been relied on since the 1980’s for the best outdoor cannabis seeds. With numerous cannabis cups over many decades, Dutch Passion have earned their reputation for their high quality outdoor cannabis seeds. You can expect heavy yields of top strength cannabis from varieties which are easy to grow and less susceptible to disease and pests.

The 10 Most Common Mistakes When Growing Cannabis Outdoors

Do you grow outdoors? You might be making mistakes that you didn’t know were affecting the quality of your harvest. In this post, we’re going to help you identify 10 of the most common mistakes so that you can increase the quality of your flowers. What are you waiting for? Keep reading!

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Growing Cannabis Outdoors: 10 Common Mistakes

Every year we see how people repeat the same mistakes when it comes to growing outdoors, and we’ve decided to put them all together in one post to help others out and prevent them from making the same mistakes. Pay attention to these 10 common mistakes when growing cannabis outdoors and get ready to fill up your pantry this season!

Germinating seeds wrong

  • Germinate the seeds between moistened kitchen towel; if you plant the seed in soil and water, you’ll most likely end up sinking the seed in deeper and making germination take much longer. Plus, when germinating in soil it’s much harder to keep stable temperatures between 20 and 24°C.
  • Take care of your saplings. Cannabis plants are never as weak as they are at this exact time; a soaked flowerpot can cause growth to stunt and even kill the plant. If you plant during spring when nights are still cold, growth can be slow; we recommend using a greenhouse or propagator to keep them safe. A propagator can also help to protect recently germinated cannabis seeds from birds.

If you want more information about how to germinate your seeds, check out our post on germinating cannabis seeds. Recently germinated plant

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Bad Planning

  • Look for high quality cannabis seeds. You can’t plant an unlimited amount of seeds, so it’s important to guarantee that the ones you plant are going to work and have decent genes. At La Huerta Grow Shop we have a wide range of seed banks that you can choose from.
  • Choose your strains wisely. Look for cannabis seeds that adapt to your growing conditions. For example, long flowering plants that are harder to grow might be a bit too much for a beginner.
  • Look for a type of growing format that matches your experience and available time. If you don’t have much experience, we recommend looking for simple fertilizer brands with few products and good results.
  • If this is one of your first times growing your own plants, remember that you’ll get better results from a simple grow with strains that are easy to grow. It’s better to play it safe than to end up ruining strains that need more experience. At La Huerta Grow Shop you can find a wide range of high-quality fertilizers.

Common watering mistakes

Water is the vehicle through which your plants consume nutrients. Being careless with water quality or watering incorrectly is a mistake that your plants can pay dearly for. Keep in minds that most tap water has chlorine, as well as bottled water – although we can drink it, it can be bad for plants and the microbial life in soil. If you use tap water, let it sit for 24h in order to get rid of most of its chlorine. On the other hand, if you have an osmosis filter, you shouldn’t have any issues; osmosis filters get rid of chlorine as well as other salts.

Dissolved salts (EC)
  • Soft water: 0 to 0.4mS
  • Normal water: 0.4 to 0.8mS
  • Hard water: 0.8 to 1.2mS
  • Unusable water: 12mS+

Keep in mind that EC levels in tap water vary depending on the location. For example, the Mediterranean coast in Spain tends to have very high concentrations – we recommend using an osmosis filter to make your water ideal for growing. You’ll need to add some calcium and magnesium to your purified water until it reaches about 0.4 – 0.5mS. Osmosis water that has been treated properly is ideal for watering or mixing with nutrients.

Acidity (pH)

In order to properly absorb nutrients, macro and micronutrients need substrate with a certain amount of acidity. In grows that use soil substrate, pH should be between 6 and 7 for nutrients to be properly absorbed. In order to control pH you’ll need to use a pH reactive kit or a digital pH meter.

Efficient Watering

Plants’ roots need nutrients, humidity, and oxygen. If you soak them, the lack of oxygen can produce a lot of stress; plants stop growing and their leaves go yellow. Make sure to water only when your plants need it, and get used to lifting the flowerpots and testing their weight to see if they need to be watered yet. Excess water can cause fungi such as Fusarium to appear in cannabis plants.

Using Bad Substrate/Growing Medium

  • Don’t use generic substrates. A big mistake is to try and save money by using lower quality soil that isn’t designed for cannabis. Cannabis plants have a series of specific requirements when it comes to acidity, salts and fertilizers; once the plant has made its home, you won’t be able to change it and it can end up influencing the entire process.
  • Get used to calculating how much soil you’re going to need. At La Huerta Grow Shop you can find a wide range of substrates at decent prices designed for high quality outdoor growing.
  • Choose the right growing medium. Always check the ingredients, which is to say, the quantity and type of fertilizer, water retention etc. For small plants, you’ll want a substrate that drains quickly such as Light Mix by Biobizz; a water retaining substrate could be an issue during the first stages.
  • Use perlite to add oxygen to the substrate.
  • Use an expanded clay base at the bottom of the flowerpot to increase drainage, as well as isolate roots from heat reflecting off the ground.

Heat Issues

Another common mistake made on balconies and terraces is that not many people keep in mind the heat reflected off the tiles on the ground. You’ll need to be extremely careful with hot floors; the roots can end up heating up too much, and if you look at it this way, nature does the exact opposite – the ground is supposed to be nice and cool.

If your plants’ roots heat up too much and end up causing the plant to stress out it can easily stunt growth and cause issues during the flowering period. Stress can reduce the quality and quantity of the final product, and plants also become more susceptible to insect and fungi infestations.

At La Huerta Grow Shop you can find white flowerpots which are ideal for outdoor grows; they reflect light instead of absorbing it and heating up the roots. White flowerpots can be squared, round and even come in large sizes with handles. Fabric flowerpots are also ideal for outdoors. If the plants are going to be on a surface that heats up easily, remember to isolate them using wooden pallets or some sort of isolating material.

Watering and Fertilizing in Summer

During the summer, water evaporation is a lot higher, so you’ll need to water more often. If you fertilize with the same amount every time you water you could end up overfeeding them; they need water, not necessarily nutrients. In order to avoid this, we recommend distributing nutrients into less doses and more water when increasing watering frequency. Excess heat in cannabis plants can cause all types of nutrient deficiencies.

Preventing Insect Infestations

Insects are always around in outdoor grows, and stopping them from becoming a problem is a task that shouldn’t be avoided. If you find insects you should act immediately before it becomes an infestation.

Essential Care for Growing Cannabis Outdoors

Discover the essential care needed to grow cannabis outdoors, from the first growth stages; do you know the dangers?

  • Routinely check both sides of plant leaves to check for insects and spiders.
  • Thrips and leaf miners are common at the start of the growing period.
  • Halfway through spring, white flies and aphids appear.
  • During the summer the biggest issue tends to be red spider mites .
  • During the flowering stage, keep an eye out for bud worms burrowing in your flowers.
  • Don’t reuse substrate/soil, especially if it has had a previous infestation.

Visit La Huerta Grow Shop to treat your outdoor cannabis plants with the best insecticides and fungicides. Bud worms are one of the most feared infestations during the flowering period.

Rot and Fungi Prevention

Another common mistake is to slack when it comes to preventing fungal infections or not acting fast enough when the first symptoms arise. Fungus on cannabis spreads easily and can quickly finish them off or make the flowers unusable.

  • Clean and disinfect pots with bleach before using.
  • Use preventive products such as horsetail, cannacure etc.
  • Use curative products such as Lexor 25 as soon as the first symptoms appear.
  • Make sure to get rid of any infections as soon as possible.

Using Nutrients and Fertilizers

  • Choosing the wrong type of fertilizer for your grow. Make sure that you’re getting the product you need. At La Huerta Grow Shop you can find professional advice when needed.
  • Inexperienced growers using complicated feeding charts.
  • Incorrect use. Make sure to start with half of the dose indicated by the manufacturer and increase it little by little.

Products are designed to be used alongside others by the same brand. If you plan on replacing or combining a product with another brand, keep this in mind and choose one with the same characteristics in order to make sure they’re compatible. At La Huerta Grow Shop you can find information about the best fertilizers for each type of grow. A cannabis plant with the necessary amount of nutrients produces more yield than a plant that has been over-fed.

Don’t Forget the Roots

Forgetting all about the plants’ roots is another common mistake to consider. A healthy root system is necessary to have a healthy plant that provides high yields of healthy flowers. Over time, roots colonize their environment and end up running out of space. Regular and feminized strains will need to be transplanted periodically when planted in flowerpots; changing to larger pots allows roots to grow even more.

Keep in mind that the final flowerpot depends on the size and yield of the plant outdoors. Transplants should be done using root stimulants, mycorrhizae and Trichoderma. These additives are designed to keep soil healthy and avoid pathogens.

When growing autoflowering plants, we recommend using a decent-sized flowerpot as you can’t transplant autoflowering plants; they have a short growth period and need as much space for their roots as possible, without going overboard. A decent root system in a healthy plant with optimal yield.

Leave the Plant Alone!

Fiddling with your plants too much can end up being counterproductive. Don’t stress the plant out; if it isn’t growing or flowering like it should, there’s a factor at play that you need to solve for it to continue as normal.

Working on the wrong issue won’t help and it can be bad for the plant. For example, the quality of the water used is not right and your plant is having nutritional issues, you won’t be able to solve this by using more nutrients or stimulants – the solution is to use better quality water.

At La Huerta Grow Shop we have a team of specialists that can help you to find the issues that are stopping your outdoor plants from growing properly outdoors. Cannabis plant flowering outdoors.

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