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The 5 Best Cannabis Strains to Grow in Small Spaces

If you want to cultivate cannabis but don’t have much space, we have good news. There are specific marijuana strains that enable you to grow weed in a confined area. Add in the low cost of cultivation, and it’s clear we live in a golden age of cannabis growing.

There are specific marijuana strains that enable you to grow weed in a confined area.

Avoiding strains that grow tall and bushy is of paramount importance. As a result, we have performed research to rule out such plants. This has enabled us to outline five small cannabis strains capable of fitting in a small space.

However, before we begin, let’s look at a few things to consider before cultivating marijuana at home.

What Your Small Space Needs

A small cultivation space doesn’t necessarily mean a low yield, but it’s important to grow as efficiently as possible. Your grow space can be as small as a 2’ x 2’ x 4’ grow tent or as large as a warehouse. However, each space should meet the following requirements:

Ventilation: Plants require fresh air. A constant change of air is important to keep them healthy and vibrant. Depending on the environment, you may need a heater or AC unit to regulate the climate.

Sterilization: You must keep the grow space clean and protected from the outside environment. You should also be able to drain plants and keep them out of standing water properly.

Adequate space for growth: Generally, you will need more height than width to keep the lighting from getting too close to the plant. Space becomes tight quickly.

For prospective growers with limited space, here is a list of the best cannabis strains to grow.

1. Amnesia Haze

Created from old Haze genetics, Amnesia Haze is a high-yielding, powerful sativa loved by many. It offers an uplifting and energizing high, is easy to grow, and doesn’t require a wide outdoor space. Since the strain is available as an auto-flowering plant, it thrives well indoors with minimal sunlight and space.

Amnesia Haze grows to medium height in both indoor and outdoor environments. It’s a highly productive strain and brings about rewarding yields, even when grown in relatively small areas. Grown indoors, the plant reaches heights of between 80 – 140 cm. If you want to keep the plant smaller, you should use low-stress training techniques.

After a flowering time of 9 – 11 weeks, this strain will yield between 600–650g/m². However, waiting a few extra weeks compared to other strains doesn’t offer many more benefits regarding flavors, potency, and effects.

When cultivated outdoors, the strain prefers a mild climate. Grown in large containers or garden beds, it will reach a height of 210 cm. It can offer a rewarding yield of up to 700g/plant.

2. Royal Dwarf

The name of this one says it all. Small, fast, discreet – that just about sums up the Royal Dwarf strain. Whether you’re a beginner or are looking for a fast-growing cycle, this strain hits the mark. Royal Dwarf is also ideal for growers with limited space and those looking to keep things discreet.

Royal Dwarf is a miniature cannabis specimen that can remain 40cm tall when trained in the right way. This strain was bred for stealth. You can grow it in wardrobes, boxes, kitchen cupboards, and even computer towers. Small LED lights are ideal in these small spaces to avoid giving off too much heat.

The strain produces an impressive yield, considering the small size. When grown indoors, Royal Dwarf plants produce about 150–200g/m² and usually peak at the height of 70 cm. However, low-stress training can help keep it at a smaller height of 40 cm. When grown outdoors, this strain grows to a height of 50–90 cm and produces 30–80g per plant.

Royal Dwarf has a growing cycle of just 8-9 weeks and a flowering time of 6-7 weeks.

3. White Dwarf

The White Dwarf strain is a short-growing and autoflowering plant characterized by its size. It’s ideal for small spaces and ready for harvest in just two months. The strain is an indica-dominant hybrid, and its effects do a good job of reflecting this.

White Dwarf is often recommended to newbie growers who are in search of a low maintenance plant. The seeds produce short bushy plants that grow to a height of 30–50 cm. The leaves are greenish, and the buds are dense and on the small side.

When grown indoors, White Dwarf does best in rich compost in individual pots. Since it is an autoflowering plant, you don’t need to vary the lighting to induce flowering. Instead, expose it to 20 hours of light each day. The flowering time is 5–6 weeks, and the plants are ready to harvest in just 8 weeks. You can expect a yield of 25 to 40 grams for each plant.

4. Easy Bud

Easy Bud is perfect for beginner growers. It is even better for anyone wanting to start low-key and garner as little attention as possible. It’s a superb indica-dominant strain that has many similarities to Royal Dwarf. The plant goes mostly unnoticed wherever it’s grown, reaching an average height of 50 cm.

This means that it’s possible to grow Easy Bud in empty cupboards, down-low attic spaces, and hidden corners of the garden. The strain can be grown almost anywhere – outdoors, indoors, on the windowsill, or in greenhouses.

The main reason for this adaptability is the short stature of the plant. Averaging heights of between 50–60cm when grown indoors, Easy Bud can produce up to 325g/m². It could offer a yield of between 30–80g/plant and grow to a height of 60–110cm when grown outdoors. The plant will be ready to harvest just 8–9 weeks after putting the seeds into the soil.

5. Critical Kush

Critical Kush is an indica-dominant cross between the famous OG Kush and well-balanced Critical strains. The average size of the plant allows you to grow it in a small, limited space. When grown indoors, the strain reaches 60–100 cm. In outdoor environments, it can reach 100–140cm in height.

Despite its compact structure, Critical Kush produces decent yields thanks to the high number of flowers that turn into tasty buds.

The flowering period lasts around 7 – 8 weeks, and the harvest occurs in late September. The average Critical Kush crop yields 500–550 gr/m2. Its high THC content makes it a great strain for relaxing both the mind and the body. It could also relieve stress and pain.

Final Thoughts on the Best Cannabis Strains to Grow in Small Spaces

You don’t need a lot of space to grow cannabis. However, choosing the right marijuana strain is imperative. There are significantly more diminutive plants available today than just five years ago.

You don’t need a lot of space to grow cannabis. However, choosing the right marijuana strain is imperative.

One of the reasons is the increased usage of Ruderalis genetics in marijuana breeding. You receive lower yields, but such strains grow quickly, which means it is possible to enjoy several harvests a year. Also, autoflowering strains don’t require a grower to force the plant into the blooming phase.

What’s your favorite strain to grow in a small space? Let us know in the comments.

If you only have a small space for growing cannabis, which strains should you choose? We've put together this list of some of the best.

Cannabis Micro Growing: Growing Great Weed in Tiny Spaces

Worried you don’t have the space to grow great weed? Well, don’t! With micro growing, you can grow superb bud in the smallest of spaces.

Contents:

The new trend of micro growing weed is challenging the norms of how much space it takes to grow great cannabis at home.

Thanks to new and improved grow gear (especially grow lights) and an increase in knowledge concerning the cannabis plant, micro growers are able to churn out great harvests in extremely small spaces.

In this article, we’ll walk you through everything you need to know about micro growing, and set you up to grow great weed in (almost) any space.

Understanding the Basics of Micro Growing

Micro growing is regular indoor growing, but on a smaller scale. It’s all about producing top-shelf bud with all the flavour, aroma, and potency you want, but in confined spaces (such as small DIY tents, cupboards, bar fridges, or even hulled desktop computer towers). Alternatively, some growers opt to buy ready-made stealth grow boxes.

The minimum amount of space you’ll need to grow weed in a micro setup is 35 × 35 × 75cm. To accommodate the lack of space in a micro grow, you’ll have to make minor adjustments to your lighting and ventilation, the strains you choose to grow, your medium, and your watering/feeding schedule.

Using the Right Amount of Soil

Micro growing is usually done using soil, as setting up a soilless or hydro system in a space as small as a mini-fridge can be very difficult. So, to accommodate the lack of space that qualifies a micro grow, you’ll want to use less soil to prevent your plants from outgrowing their small room or tent.

The root system is a crucial part of the plant, and its size has a great influence on how tall the plant will grow. Most plants tend to occupy the same amount of space below the ground as they do above. In a micro grow, we can use this correlation between the size of the root system (thus, the amount of medium) and plant size to control the growth of our cannabis plants and match it to our spatial limitations.

Below you’ll see how different pot sizes will impact the height of your cannabis plants:

1–1.5m
5l pots:

60cm
2–3l pots:

24cm
500ml pots:

Note that these figures are just estimates, and the exact size of your cannabis plants will vary depending on their genetics. Also, keep in mind that plants grown in small containers will need to be fed and watered more regularly than plants grown in larger containers with access to more soil.

For micro growing, we generally recommend sticking to 3l pots. However, we’ve seen some growers working with slightly larger spaces use up to 9l pots. How big or small you choose to go with your pots is up to you; just keep in mind that using bigger pots will likely restrict the number of plants you can grow (but more plants won’t necessarily translate to a bigger micro grow yield).

Finding the Right Grow Light

First and foremost, you’ll want to turn to LEDs for micro grows. HPS and HPI lights simply aren’t suited to these small grows as they produce far too much heat.

For the best results, we recommend using LED panels. A 15W panel is capable of producing op to 3000 lumens while producing almost no heat and taking up virtually no space (the panel measures just 130 × 110mm).

Alternatively, we recommend using any small 60W LED panel for your micro grow. Depending on just how small of a space you’re growing in, you’ll likely never need to keep this panel running at 100% capacity. We recommend keeping it at 25–50% to help control your plant’s stretch during veg, then turning it up to 50–75% during bloom, depending on the plant’s stretch. You can also control the panel’s light schedule using a controller, which is app-operated.

Properly Placing Your Grow Light

One common question micro growers face is this; where do I place my grow lights?

Traditional indoor grow setups place the main grow light directly above the canopy. But, since micro growers are often working with extremely small spaces, this setup might not always be the best option.

In small vertical spaces (like a grow box, small cupboard or furniture piece, or computer tower), you’ll usually be better off placing your main grow lights along one or multiple sides of your plant. This will allow you to grow a bigger canopy, improve light penetration through the canopy, and prevent plants from stretching towards the top of your grow space.

For even more control, you may want to consider building two separate grow boxes; one for veg and another for bloom. In the veg box, you may be able to get away with placing your grow light right above your plant, as light penetration isn’t as much of an issue during veg as it is during flowering. Remember to keep in mind the speed at which your plants grow, and try to find strains that grow at a speed that suits the size of your space.

If you do opt to install your veg light above your plants, remember to keep it at the right distance and intensity. If your grow light is too close or too strong, plants are likely to develop very short internodes and might show signs of light stress. If, on the other hand, your light is too far or too weak for your plants, they’re going to stretch and develop long internodes.

In your bloom box, however, we recommend placing your grow light along the sides of your plants. This will provide the best light penetration and allow you to grow a longer vertical canopy of buds. We also recommend using a vertical net to keep your plants centered. You can also use this net to train your plants gently and control their growth as you see fit, given your space.

How to Manage Ventilation and Smell in a Micro Cannabis Grow

While it might seem like a trivial detail, properly ventilating your cannabis micro grow is a must. When working with such a small space, air can quickly become stagnant and start creating a lot of problems for your plants. This is because plants consume the CO₂ in their environment for photosynthesis. When growing in such small spaces, your plants have very limited access to fresh, CO₂-rich air, making proper ventilation a must for healthy plants.

Luckily, ventilating a cannabis micro grow space is easy.

If you decide to build your own micro grow setup, all you’ll need to keep your space ventilated is a small outtake fan, like this 24V Brushless Centrifugal Blower. While it might not look like much, this tiny fan will do a perfect job at removing old, stagnant air from your grow space. For the best results, we recommend installing it directly above your plants.

If you’ve got enough space, you may even want to consider keeping a small hand-held fan inside your space to keep air circulating properly around your plants.

For even better ventilation and air circulation, we recommend installing a small intake fan at the bottom of your micro grow setup. A high-speed cooling fan, for example, will let a constant influx of fresh air into your micro grow space.

Because micro grows usually only allow you the space to grow one small weed plant (or two), you shouldn’t need to use carbon filters to manage the smell of your operation. However, if you want to be extra safe, installing a carbon filter to the outtake fan we mentioned above is simple. The filter needs to be installed in front of your outtake fan, and therefore may rob you of some space inside your mini grow room/box.

How to Water Cannabis Plants in a Micro Grow

Watering your cannabis plants in a micro indoor setup can be tricky due to the lack of space. If you’re building your own micro setup, take this into consideration and try to leave enough space around the base of your plants so you can water them comfortably. Remember that water splashing up onto the foliage and buds of your plants can cause fungal issues, so you’ll want to avoid it at all costs.

If you’re growing in a truly tiny space—one where you can’t walk around or get a good position over your plants—make sure you can remove your plants for watering so you don’t end up making a mess of your space.

Given the small scale of a micro grow, we generally don’t believe they warrant the installation of any automatic watering systems. Just have the patience to manually water your plants using a small watering can or bottle.

How to Use Growing Techniques in a Cannabis Micro Grow Setup

Micro grows typically call for smaller, bushier plants. In order to achieve this kind of structure and produce decent harvests in such small spaces, you’ll want to employ some growing techniques like LST, HST or ScrOG, and Defoliation. Below, we’ll share some basic tips on how to adapt these techniques to a micro grow setup.

LST is easily one of our favourite grow techniques, and can come in super handy when growing in small spaces. The only way your LST technique might vary when micro growing is in how you direct your plant’s growth. Remember, the goal of LST is to open up your plant and improve light penetration. Think about how you’ll achieve that given the lighting in your micro grow room.

HST (Topping, Super Cropping, FIM, etc.)

High-stress techniques may be a little trickier to apply to a micro grow. Topping or fimming, for example, create multiple dominant colas, which may not be ideal in small, narrow vertical indoor gardens.

If you’re growing in a short yet wide space (like a shelf, for example), you may want to use super cropping or fimming early on to create a short canopy packed with thick colas. In fact, super cropping may come in handy in either case, as it strengthens your plant in time for bloom and, like LST, can direct growth in the right direction to make better use of your lights.

ScrOG

Screen of green is another of our favourite training techniques, and you’ll be glad to know you can take advantage of it even in small micro cannabis gardens. If you’re working with a narrow vertical space with lateral lights, for example, using a vertical screen can be one of the best ways to create a big canopy that receives a ton of light.

In a short, horizontal micro grow cabinet, on the other hand, you can use ScrOG as you would in a regular indoor garden to create a thick, even canopy that, come harvest time, will be loaded with sticky buds.

Defoliation

Defoliation is essential to micro growing. In a narrow, vertical grow room with lateral lights, defoliation will help you clear unnecessary foliage and ensure all parts of your plant get enough light to develop big, thick buds.

When to Switch Your Micro Grow Room to Bloom

In general, we recommend you flip your vegetative cannabis plants to bloom once they’ve grown to half of the height of your micro grow box. This will ensure they’ve still got enough space to accommodate their pre-bloom stretch without growing too close to the top of your box/room.

Remember that the rate at which your plants grow is directly related to the amount of light they receive. More light will result in shorter internodes, while plants grown with less light will stretch, resulting in larger spaces between each node. You may need to play around with the lighting in your micro grow room to find the sweet spot for each of your strains.

Micro Growing Cannabis: Expect Realistic Results

As with any cannabis grow, it’s important to set yourself some realistic expectations regarding the size and quality of your harvest, as well as the amount of time it’ll take you to get from seed to harvest.

In general, growing in a small 35 × 35 × 75cm space using a rough average of 30W of light throughout your entire grow, you can expect to harvest between 25 and 45g, depending on the strain, your feeding routine, training techniques, and skill. You’ll usually be able to go from seed to harvest within 3–4 months, depending (obviously) on your light cycle and the genetics of your plants.

Finally, the cost of setting up your micro grow box/room will vary greatly. If you choose to build your own micro grow space, you may be able to do so relatively cheaply (keep in mind that your LED panel will easily be the biggest upfront cost).

Choosing A Suitable Strain

When it comes to micro growing, choosing the right strain is very important due to the limited space available. One of the things to watch out for is the height of your cannabis strain. Sativas grow higher and more slender than indicas, which tend to be short and bushy.

Furthermore, during the flowering phase sativas undergo a 200-300% increase in height, while Indicas increase only by 50-100%, which shows that indicas are more compatible with micro growing.

Another reasonable option would be autoflowering strains. No matter what the conditions, autoflowering strains stay small due to their genetics (a great many of them even smaller than indicas) and aren’t dependent on the light regime, which means they will have a shorter harvest time.

3 Great Strains for Micro Growing

Of course, some genetics are more suited to micro growing than others, and the following three are prime examples of quality picks. You’ll notice these strains all have something in common: they’re autoflowering.

ROYAL DWARF

Royal Dwarf truly is a miniature cannabis specimen that can remain at tiny sizes of 40cm tall when trained in the ways mentioned above. This plant was bred for one reason and one reason only: stealth. Growers can easily cultivate multiple Royal Dwarf plants in their home without a single suspicion being raised. She can easily be grown within modified kitchen cupboards, wardrobes, boxes, and computer towers. Small LED lights can also be used within these tiny spaces to avoid giving off too much heat. Royal Dwarf is essentially the autoflowering version of the legendary Skunk, and was made using a Skunk strain along with a specific ruderalis cultivar. She offers stimulating but subtle sativa highs fuelled by THC quantities of 13%. She can therefore be smoked all day long whilst allowing the user to stay on top of their game and not get too high. Her small yet compact flowers offer sweet and citrus tastes.

Royal Dwarf will be ready to harvest a mere 8–9 weeks after seeds have been germinated. Plants grown indoors will provide yields of up to 200g/m² and won’t exceed 70cm in height. Plants grown outdoors within garden beds or guerrilla grow spots will produce harvests of 30–80g/plant and reach heights of between 50–90cm.

Think you haven't got the space to grow weed? Think again. With our guide on micro growing, you can grow top-shelf bud at home in even the tiniest of spaces.