The Wonders Of Micro Growing – High Quality Cannabis In Tiny Spaces
You probably thought about growing your own weed sometimes, but concluded that it’s too much of a hassle? Look no further, micro growing has everything you’re looking for and more.
As cannabis and its cultivation is more popular than ever and it seems that trend won’t stop soon, we see more and more people wanting to grow their own cannabis. Most beginners to growing don’t have the necessary experience or knowledge to start a full-blown indoor or outdoor growing operation, so they opt for a simpler option – a micro grow. Take a couple of seeds and plant them in a cupboard or a similarly small space, trying to get the best possible results of it – or in other words – micro growing. It is a natural way for beginner growers to get that needed experience and to experiment with no fear of ruining a big and expensive operation. This article will cover the basics of micro growing and the differences between it and a standard indoor grow, so let’s get started.
THE BASICS AND THE DIFFERENCES
Micro growing would best be described as a process of growing a small batch of cannabis in a limited space, trying to get the best possible results. That being said, micro growing is a type of indoor growing, just smaller in proportions. The main difference between a micro grow and a usual indoor grow is exactly that – the amount of space. Due to the lack of space, all the other basic aspects of cannabis growing – light, water and air supply, soil, the choice of strains – differ slightly from your regular indoor grow. Almost any space you imagine can be used for micro growing, from cupboards to computer cases. The main idea (and challenge) is to create the optimum conditions for your plants to thrive in that space.
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.
Most plants you see occupy the same volume beneath the ground as above. The reason behind this is because the root system is vitally important to a plant, being the part of the plant where it takes up nutrients and water. The amount of space occupied by a plant’s root system has a great influence on the plant’s size. We can use this correlation to our advantage as micro growing is concerned. The volume of the pot you use to grow your plant in is directly related to how large the plant will grow. To give you an impression:
- Around 12 liters and more: average plant height
- Around 5 liters: height of plant up to 60cm
- Around 2-3 liters: height up to 24cm
- Around ½ liter: height up to 13cm
A thing to note is that due to the small quantity of soil your plants will need more fertilizer and water than regular plants.
You can’t grow cannabis at all without light and you can’t grow good quality cannabis without proper lighting. Choosing the optimal lighting for your micro grow is an important decision and you have a variety of lamps to choose from – fluorescent tubes, CFL (energy-saving lamps), HPS, HPI and LED bulbs. When choosing a lighting you got to keep an eye out for the wattage and the heat the lighting produces. When it comes to wattage, an average of 400W is required for a square meter.
HPS and HPI lamps are the go-to lightings of indoor growers because of their high light output and 400W is lightweight for this kind of lamps. But, the problem with this kind of lighting is that it produces excess heat, which especially won’t help with your micro grow. Due to the lack of space things get very hot very quickly and your plants will be in danger of drying out.
But, fear not, this is one of the reasons we have fluorescent tubes and CFLs. They are very similar and both have a great light output, don’t dissipate much heat and are available in different light colours. You can help your cannabis plant with different light colours – a plant in the vegetative state needs more blue light, while a flowering plant requires more red light.
And at last, LED lamps. A good choice for micro growing, because they have a wide light spectrum and virtually don’t heat at all, but they come with a hefty price and may not be suitable if you’re planning a certain budget.
AIR AND WATER SUPPLY
As with light, your plants can’t live and grow without water and air. Having a good and clean ventilation and water supply system is a necessity for any grow, including micro grows.
The movement of air is necessary to a grow, because CO2-rich air is quickly depleted and that is a requirement for your plant’s photosynthetic process, which causes new plant cells to grow. The heated air due to the lighting needs to get out of the grow too, as it dries out the plants. Usually, table fans are used in indoor grows, combined with ventilation systems, but that is probably not practical for your micro grow. A neat solution is a computer fan. You put one at a low point that will act as your intake fan and put another one in a higher position to act as an exhaust fan. This way, as heat rises, the hot air will come out first, replacing it with cooler and fresher air. Don’t forget to use some kind of filters on the fans which will help you battle unwanted pests and odors.
Watering your micro grow becomes tricky after a while, as the plants become bushier and expand in width. You will need to use a small water system or make the grow accessible from the side to water your plants from the bottom. Don’t forget that plants in micro grow need more water than plants in regular grows, as they have less root space.
It was mentioned before, that space is the main difference between micro growing and a regular indoor grow. This lack of space usually calls for shorter and bushier plants, which is shown in the choosing of the right strain. There are other ways to influence a plants growth, such as various growing techniques: topping, super cropping,screen of green (ScrOG) and low stress training (LST).
Topping is the process of cutting off the very top of the plant, which stimulates the plant to grow new secondary branches. This way, the plant grows in width and not height, growing in a bush-like shape and creating more buds. Super cropping (or HST – high stress training) on the other hand, requires you to break the stem of the main branch. This technique needs to be done carefully. You need to break the stem in such a way, that the plant thinks it is gone for good and starts growing side branches, but not completely, so that the main branch can recover and grow to a smaller height.
The ScrOG technique requires you to put a mesh wire screen between the soil and the light source. Once the branches grow through the screen, you can tie them to the screen to force them to grow horizontally, hence the name. With ScrOG you manage the height of the plant and all the tops get the same light. LST is a somewhat similar technique, where you tie your plants higher branches to the soil, forcing the plant to grow side branches and more colas, with the end result being a higher yield in a smaller space, perfect for micro growing.
Beginner growers need to know that a micro grow isn’t a worthy substitute for a real indoor or outdoor grow. But, it is perfect as a starting point to develop that green thumb and to learn about the important things you need for a good cannabis grow. Feel free to try out and experiment with new strains, techniques and instruments, as long as you treat your plants with care. The whole process of growing a plant is a reward in itself, not to mention the harvest, so what are you waiting for?
3 GREAT STRAINS FOR MICRO GROWING
1. 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.
You want to start your own cannabis grow? Micro growing is a perfect way to start learning about growing cannabis and experimenting on your own terms.
How to Grow Small Cannabis Plants in Tiny Spaces
Do you want to grow tiny cannabis plants? Would you like to build a “microgrowery” for your marijuana garden? This tiny plant tutorial will teach you how to grow cannabis plants that stay small yet still produce an abundance of weed! I’ve grown a lot of cannabis plants of all sizes, and I’ll share the most helpful tips and tricks to make cannabis plants grow in the exact shape and size you want.
Small plants are easy to hide, yet can still produce a surprising amount of weed. Here are some short cannabis plants I’ve grown:
LEDs are probably your best choice in a small space. This tent is only 3 feet (90 cm) tall.
Here is that tent just before harvest. Notice the size of the slinky compared to the plants. This tutorial will show you how to create short plants with rows of buds in a small space like this.
This autoflowering plant grew into a tiny bud ball as a result of blue-spectrum LEDs and being topped after buds started forming (typically a no-no because it stunts autoflowering plants, but can be a good technique if you want to keep plants tiny)
I grew these plants in the same waist-high grow tent, but this time using a T5 fluorescent light. A T5 is another great choice for small spaces since they can be kept just inches away from plants. The downside is they produce more heat than LEDs. If you’re struggling with cold (for example growing a tiny garden in a garage or basement), fluorescent lights can help keep plants warm. If you want to minimize heat, LEDs are the way to go.
Then there’s the incredible world of solo cup plants. Restricted roots keep plants small. This autoflowering plant I’m growing now is just over a foot (30 cm) tall and buds are getting bigger every day.
Quick Summary (how to keep plants small without sacrificing yields)
Here’s a quick overview of the tutorial, then I’ll go into the detailed instructions below.
- Choose a strain that naturally stays small – Today you have access to almost any genetics, almost anywhere in the world. Quick-to-harvest autoflowering strains are often the best choice for producing small plants, though short stature photoperiod strains can work, too. This tutorial shares several strains that have performed great for me in short spaces, and then I’ll share instructions on how to grow your plants so they stay as small as possible.
Certain strains like this Black Jack Auto naturally stay small, while still producing great yields!
2.) Grow Setup
- Use the right grow light – Fluorescent lights (like CFLs or T5s) and certain LEDs are great choices for small grow spaces. I’ll break down the pros and cons of each and share the specific models that have kept plants short for me.
- Light spectrum – Grow lights with more blue in the spectrum tend to keep plants short, while grow lights with more red can encourage stretching.
- Restrict root space – Plants in big pots can become the size of trees! Keeping plants in smaller pots tends to keep them from getting as big (like a bonsai tree with restricted roots), but buds will still get fat as long as the plant is receiving plenty of light and nutrients.
- Pick a “short” grow style – Short plants are often created through one of these grow styles: “Sea of Green” (many small plants in small pots), “Screen of Green” (using a screen), Manifolding (massively manipulate plant shape at a very young age), or other types of plant training (more on that below).
Restricting root size also restricts overall plant size
3.) Growing Practices
- Keep grow lights as close as possible – Make sure your grow light is as close as possible without stressing plants. Strong light helps keep plants shorter.
- “Top” your plants – Cut off the top tip of the plant when it’s just a few weeks old. This technique is known as “topping” and causes plants to grow bushy and spread out as opposed to tall like a Christmas tree. As a bonus, you create extra bud sites for free.
- Plant training – Learn how to get any plant to stay the exact height and shape you want via “plant training” techniques. Even if your plants are already too big, this can help. Especially techniques such as LST (low stress training) and supercropping (extreme bending) can come in handy if you need to change your overall plant shape or reduce the height.
- Don’t wait too long to initiate flowering – This doesn’t apply to auto-flowering strains, but if you’re growing a photoperiod (regular) plant, initiate the flowering stage when the plant is half the final desired size. Plants typically double in size after receiving a 12/12 light schedule. Plant height can get out of control if you wait too long. I learned this one from experience!
Bending and tying down stems can be used to keep a cannabis plant almost totally flat
Choose a strain that naturally stays small
Some cannabis strains tend to grow really big and tall no matter what you do. If a strain is labeled as “XL”, stay away! However, some strains stay super small without you having to do much of anything.
Auto-flowering strains start making buds in about 3-4 weeks from germination and are typically ready to harvest in 2-3 months. Due to this quick life cycle, nearly all auto-flowering strains stay on the smaller size. However, look for autoflowering strains listed as being short if you want the smallest possible plants.
Recommended short auto-flowering strains
- Amnesia Auto by MSNL – I’ve harvested 3 of these plants and highly recommend the strain. They stayed small, grew sparkly buds with cerebral strong effects, and produced good-to-great yields
- Berry Auto by G13 Labs – Fruity strain that stays short, grows easily, and is ready to harvest quickly
- Black Jack Auto by Sweet Seeds – These plants naturally stay small while still producing great yields. If any branches get tall, they respond well to training. I really enjoyed the bud effects of this strain. They’re strong yet kind of unique. It reminds me of a sativa/haze with more of a body stone.
- Blue Critical Auto by Dinafem – The Blue Critical I grew stayed small, bushed out on its own, responded extremely well to training, and buds came out fat and super potent! A joy to grow.
- Cinderella Jack Auto by Dutch Passion – When I grew this strain, the plant stayed small and produced solid, dense buds. The buds ended up being popular because the effects were curiously strong and long-lasting.
- Cream Cookies Auto by FastBuds Seeds – The bud quality is out of this world. And look beautiful in pictures! Each plant stays short, is easy to grow, and yields well.
- Cream Mandarin Auto by Sweet Seeds – This strain tends to stay very small, sometimes almost runty. Although the citrus-smelling buds aren’t the biggest, they’re ready to harvest quickly and produce captivating effects.
- Pineapple Express Auto by G13 Labs – An extremely popular autoflowering strain; plants stay short, are quick-to-harvest even for an auto, and the sparkle-encrusted buds smell like heaven.
- Pink Kush CBD 30:1 by Seedsman – Medicinal strain with under 0.5% THC, beautiful buds, quick-to-harvest
- Red Poison Auto by Sweet Seeds – This breeder has created several epic autoflowering strains, but the Red Poison Auto may be my favorite. I love the crazy red/purple color (which shows up on most plants, especially if the plant gets cool nights close to harvest), good yields, and dreamy bud effects.
- Tangerine Dream Auto by Barney’s Farm – The intoxicating smell of citrus on a tiny, high yielding plant. What more could you want?
- THC Bomb Auto by Bomb Seeds – I’ve grown 5 different plants of this strain over multiple grows in different setups, and every one came out excellent. Easy to grow, great yields, beautiful sparkly buds, and potent. Highly recommended!
- Wedding Cheesecake Auto by FastBuds Seeds – Stays pretty small, quick to harvest, and buds produce powerful effects.
This Amnesia Auto by MSNL stayed small but produced a surprising amount of bud!
Decent sized buds for the compact size
THC Bomb Auto grows thick buds without needing a lot of height, and buds are POTENT
You can also choose photoperiod plants listed as “short” strains. Strains listed as “FAST” or “Express” may be candidates for a short grow space because they have a quick flowering period, but it’s good to read the description to learn more about what height to expect. Photoperiod plants typically get bigger than autoflowering plants, but they can be a great choice for a small space as long as you get a suitable strain and make sure to initiate the flowering stage when plants are 3-4 weeks old. Don’t let them get too big before you initiate 12/12 or they’ll overgrow your garden!
Recommended short photoperiod strains
- Aurora Indica by Nirvana – Plants are fast-growing with dense, potent buds, yet they stay short and are ready to harvest quickly.
- Candy Kush Express FAST by Royal Queen Seeds – Easy to grow and quick to harvest. Buds smell divine and effects are extremely relaxing.
- Cream Caramel FAST by Sweet Seeds – Great yields on such a fast-flowering plant, tantalizing bud smell, and lovely effects.
- Original Amnesia by Dinafem – This strain isn’t particularly quick to harvest but doesn’t get very tall. Plants respond positively to plant training including manifolding. Buds are big and beautiful, with effects that live up to the name “amnesia”
- Peyote Critical by Barney’s Farm – Trippy effects on this strain. Plants stay short with training. Try to initiate the flowering stage before 4 weeks from germination and it shouldn’t get too big.
- Romulan – This strain is extra popular where I live right now. Romulan plants stay short and buds are high in THC. Although it doesn’t have the best yields, the bud quality is worth it.
- Royal Cookies by Royal Queen Seeds – Created from the extremely popular Girl Scout Cookies Forum Cut, this strain delivers beautiful American genetics with a punch, and plants stay small enough for a stealthy garden.
- Speedy Chile FAST by Royal Queen Seeds – Grow ultra sparkly buds on a tiny plant. The effects are relaxing and may help with anxiety.
- Sweet Russian by Garden of Green – Nice looking buds, stays small, yields well, good effects.
- Sweet Tooth by Barney’s Farm – I’ve grown this strain a few times over the years, and it always stays short with good effects. However, BF seems to be improving and refining this classic strain for potency because when I grew this strain again last year, the buds felt more powerful than ever. Highly recommended!
- THC Bomb by Bomb Seeds – Stays small, yields big, with excellent potency and sparkly buds. Can’t go wrong with this one.
Aurora Indica stays short and produces tons of buds
Original Amnesia responds well to plant training such as being manifolded
2.) Grow Setup
Use the right grow light – CFLs, T5s, and certain LEDs are great choices for small grow spaces. I’ll break down the pros and cons of each and share the specific models that have kept plants short for me.
CFLs give a lot of flexibility in tiny spaces because they’re small and can be kept just inches from plants. How to grow with CFLs.
This is my very first short plant, grown under a few big CFLs.
The plant was less than 1′ tall at harvest yet produced 1.5 ounces of bud. CFLs can produce good yields with small plants, but CFL bulbs that are big (or a lot of small CFLs) get hot and expensive. If you have space, I recommend upgrading to more efficient grow lights than CFLs.
T5 fluorescent lights are low profile, can be kept close to plants, and produce surprisingly good yields if you train plants to grow wide and flat like the plants here. The downside is they get much hotter than LEDs for the same electricity, and the yields aren’t as good per watt. How to grow with a T5 grow light.
LEDs come in a variety of shapes and sizes, so they can fit almost any setup. LEDs tend to be low on heat and electricity usage, which makes them great for small stealthy gardens. LED yields are excellent, too. On average, LEDs produce about twice the amount of dried flower as fluorescent lights like CFLs and T5s for the same electricity. The newer models of LEDs can yield even more. How to grow with LEDs in a mini tent.
These plants were grown in a 2’x2’x3′ tent under a 100W Quantum Board LED like this MarsHydro TS 600 (which is “600W equivalent” but actually only uses 100W)
Here is an example of the buds produced! (This was Auto Amnesia by MSNL)
Light spectrum – Grow lights with more blue in the spectrum tend to keep plants short, while grow lights with more red can encourage stretching. LEDs or bulbs labeled with a spectrum of 4000k, 5000k, and 6500k are great choices with plenty of blue to keep plants short.
This graphic represents the colors in visible light. Blue light encourages plants to stay short and bushy. Red light tends to cause marijuana plants to stretch and grow tall.
Restrict root space – Plants in big pots can become the size of trees! Keeping plants in smaller pots tends to keep them from getting as big (like a bonsai tree with restricted roots), though buds will still get huge as long as the plant is receiving plenty of light and nutrients.
Keeping plants in a small container causes them to stay smaller on average by restricting root size. This autoflowering plant grown in a solo cup barely grew to a foot tall.
These autoflowering plants were all germinated at the same time and even share 4 of the same strains. The little tent had 1-gallon pots, while the bigger tent used 3-gallon pots. The smaller pot size is a big part of why the plants in the mini tent stayed so much shorter and smaller.
Here’s another example showing how pot size makes a difference to plant size. These plants were all germinated at the same time in Rapid Rooters. Right before this picture I planted some of the seedlings in 3-gallon pots, and the others in solo cups. They were all about the same size at this point.
Within a week, the plants in bigger pots overtook the plants in solo cups. Most actually had an extra set of leaves compared to their solo cup siblings. The size difference would only have kept getting more vast if these plants were allowed to continue growing together. Small pots make small plants! Here’s a timelapse of that week if you want to check it out.
Pick a “short” grow style – Short plants are often created through one of these grow styles…
- Sea of Green (SoG) keeps many small plants in small pots
- Screen of Green (ScrOG) trains plants to grow along a screen or net, which forces them to stay about the same height
- Manifolding is a process that massively manipulates plant shape at a very young age for a bushy, symmetrical plant
- Other types of plant training such as Low Stress Training (LST) and Supercropping (extreme bending) can also be helpful to keep plants short
Sea of Green (SoG) – Many small plants
Screen of Green (ScrOG) uses a screen or net
Here’s another example of a net being used to help keep plants short and flat
Manifolding creates a solid main trunk with several symmetrical branches. This allows you to achieve monstrous yields on a relatively small plant.
Other types of pruning and manipulation such as Low Stress Training (LST) and Supercropping (extreme bending) can be used to create almost any size or shape plant
3.) Growing Practices
Keep grow lights as close as possible – Make sure your grow light is as close as possible without stressing plants. Strong light helps keep plants shorter. How far should I keep my grow lights?
“Top” your plants – Cut off the top of the plant when it’s just a few weeks old. This technique is known as “topping” and causes plants to grow more spread out as opposed to tall. You want a short bush, not a tall Christmas tree. Learn all about topping.
“Top” your plants when they’re 3-4 weeks old
A good time to top a plant is when it has about 6 sets of leaves
To top a plant, you cut off the top by clipping through the main stem
Topping makes plants grow more wide and bushy instead of tall. As a bonus, it increases the total number of main bud sites and improves yields!
Autoflowering Tip: Top an autoflowering plant after it’s already started making buds to keep it shorter. Topping in the flowering stage is normally considered a bad idea because it stunts most autoflowering plants, but can be a good tactic if you want to stunt the plant on purpose.
Topping after buds had already started forming caused this plant to stay extra small.
Here’s another example of a plant that was topped after it had already started making buds
Plant training – “Plant training” techniques give you ultimate power to create plants of nearly any size or shape.
Training techniques such as LST (low stress training) and supercropping (extreme bending) are especially handy if you need to change your overall plant form or reduce the height.
The grower wants to keep plants as short as possible
As the plants grew, she regularly bent all the top branches over and tied them down
That’s how these tiny plants were made!
Use bending to reduce the height of tall branches. Don’t forget to tie the branches down or they’ll turn back up! (I like plant twist tie for hooking around stems)
The arrow points to the twist tie that was used to hold down the branches as this plant grew
Use supercropping to bend at right angles without breaking your stems. This can be especially helpful if you’re plants are already too tall for your space.
Some growers take plant training to extreme levels
Check out the “skeleton” of the above plant after harvest. The grower basically trained the main stem to grow in a flat spiral around the base. So much bud in such a small area!
You can produce impressive buds on a small plant with a powerful grow light and high-yielding genetics
It’s amazing what can be accomplished with a little bending and tying down as your plant grows!
Don’t wait too long to initiate flowering – This doesn’t apply to auto-flowering strains, but if you’re growing a photoperiod (regular) plant, initiate the flowering stage when the plant is half the final desired size. Plants typically double in size after receiving a 12/12 light schedule, so plant height can get out of control if you wait too long.
Initiate 12/12 when your plant is about half the final desired size
Plant about double in height before harvest, though some strains “stretch” more or less (notice how the back left plant from the above tent got taller than the rest). Genetics make a huge difference! Learn more about the flowering stretch.
You should now have a solid understanding of what it takes to grow marijuana plants in any size or shape you want!
How to Grow Small Cannabis Plants in Tiny Spaces Do you want to grow tiny cannabis plants? Would you like to build a “microgrowery” for your marijuana garden? This tiny plant tutorial will teach