grow one cannabis plant

How to Grow Just One Indoor Cannabis Plant

You may be wondering, “Why on earth would anyone want to grow just one cannabis plant?” Well, if you think about it, you’ll find a bunch of reasons why some folks might want to grow just one plant, such as:

Space limitations and time constraints: You’ll be able to grow a one-plant garden in a spare corner or closet with a relatively small time commitment.

Reduced cost: You’ll need less equipment, materials, water, and electricity for a one-plant harvest.

Legal restrictions: If your local laws only allow home grows of a few plants, you can start with a few clones, and take the best one to harvest.

Beginner grows: If you’re just starting out, you can learn from mistakes without putting too much cash and effort into your first few attempts.

Experimentation: More advanced cannabis cultivators may want to do one-plant grows to try out new techniques.

If you manage to pull off a decent harvest, your savings in dispensary weed can even offset your gardening investment. Who knows? You might decide to keep going with your new hobby. In any case, let’s get you started with our 10-step, seed-to-harvest guide to growing a single cannabis plant.

Step #1: Learn Everything You Can About Growing Cannabis

There’s no substitute for the advice of experienced cannabis growers. Cultivating top-notch ganja and harvesting high yields is both a science and an art, which takes years to master. You’ll want to spend some time studying the work of cannabis-growing experts, especially if you’re not already a gardener.

Here are some suggestions to get you started:

Marijuana Grower’s Handbook by the Guru of Ganja, Ed Rosenthal

True Living Organics by the Rev, Skunk magazine’s cannabis growing expert

The Cannabis Grow Bible by Greg Green, a compilation of cannabis-related resources

Step #2: Order Seeds or Clones

The first decision you’ll need to make is the choice to start with seeds or clones from a reputable seed bank. If you’re planning to grow from seed, you’ll want to buy at least a 3-pack just in case the first seed fails to germinate. And since you’re just growing one plant, you’ll need high-quality feminized seeds to make sure your plant’s a bud-producing female.

With clones, you can be sure that your plant will be female. But depending on where you live, you may have difficulty obtaining clones or have a limited strain selection.

Your second big decision will be which strain of cannabis you’ll grow. Some questions you may want to ask yourself before choosing a strain include:

Is this strain easy to grow? Select a hearty variety that’s relatively pest and disease resistant.

What are the minimum and maximum yields from this strain? Since you’re only growing one plant indoors, you’ll want a strain that’s capable of large yields in small spaces.

What are your desired effects? Are you looking for a strain for relaxing after work, energizing your creativity, or for therapeutic purposes?

Step #3: Choose Your Grow Space

Before you head off to buy equipment, you’ll need to decide where you’re going to grow. Here’s a few important things to consider when choosing your grow space:

Location to services: Select a growing area that’s convenient for electrical access, water supplies, and exhaust windows.

Privacy: Besides protecting your plant from prying eyes, you’ll want to keep your grow area safe from children and pets who can damage plants and introduce insects.

Tent or closet: While repurposed closets may seem convenient, you’ll need to modify them considerably to make them suitable for growing cannabis. Small grow tents are relatively economical and offer many advantages. If you have a bit of extra money to invest, you can even buy a grow tent package that includes everything you’ll need.

Step #4: Decide on Your Grow Medium

Indoor growers have a ton of choices with respect to grow mediums: rockwool, coco coir, jiffy pellets, even aeroponics. However, good old-fashioned soil is by far the best growing medium for a one-plant grow, especially if you’re a beginner.

Soil naturally maintains a certain level of balance in nutrient levels. With soil, you won’t have to obsess about the pH of your water or shell out tons of cash for expensive nutrients.

We recommend starting with a high-quality, organic soil and adding perlite to increase airflow and drainage.

Step #5: Get Equipment and Set Up Your Space

The most essential and costly equipment you’ll need are grow lights, fans, and filters.


Since you’re only growing one plant, you have several viable choices when it comes to lighting, including:

Metal halide (MH) and high-pressure sodium(HPS) – As more growers are switching to LED and other modern lighting systems, you’ll be able to find used old-school MH/HPS systems at deep discounts. You may even have a friend who’s willing to lend you some lights. However, MH and HPS lights tend to use a fair amount of electricity and generate a lot of heat. The cost of your power bill may quickly outweigh the low investment for lights.

Compact fluorescents (CFLs) – CFL’s are by far the best budget option for small grows. They’re inexpensive to purchase, cheap to run, and don’t give off much heat. You can screw CFLs into just about any light fixture you already have on hand, so you won’t need an expensive ballast. CFLs don’t generate much heat, so you can place them closer to your buds and use them for the seedling stage without worrying about burning your plants.

Full-spectrum LED – If you’re not on a tight budget, a full-spectrum LED is the way to go for your indoor grow. LEDs are energy efficient, and you won’t need to worry about changing bulbs for the flowering stage. Furthermore, LEDs hardly generate any heat, so you’ll be able to let your plant grow taller without worrying about it getting burned by your light.

Other Equipment

A fan and a filter are essential items for a grow room, even if you’re only growing one plant. Your plant will need adequate airflow to thrive, you may need to reduce the heat from the lights, and you’ll probably want to filter out the cannabis odor during the flowering stage. Although you can buy them separately, a fan/filter combo will work fine for a single plant harvest.

Humidity is another critical consideration for growing cannabis. Depending on your location, you may need a humidifier or dehumidifier to optimize conditions in your grow space. In any case, make sure you place a thermometer and hygrometer in your grow area.

You’ll need to gather a few other relatively inexpensive items before starting your grow, such as:

Containers in at least three different sizes

Razors and scissors for pruning and training

NPK fertilizers and/or organic teas

A pH kit, jeweler’s loupe, spray bottle, and a timer

Steps #6: Germinate Seeds or Start Clones

The most common way to germinate cannabis seeds is to soak them in a glass overnight, and then use the paper towel method to get them to sprout.

Once your seed has sprouted, you’ve planted it in soil, and it starts to grow, your plant will have entered the delicate seedling stage. Think of your new plant as a baby. Make sure you don’t overwater or overfeed your seedling, and be careful not to burn it with your grow light.

When your plant grows around seven or eight sets of leaves, transfer it into a pot about double the size of your original container. Give the plants 3 or 4 days to adapt to the new containers, and then prepare the conditions of your grow room for the vegetative stage.

Step #7: Conquer the Vegetative Stage

The vegetative stage is your big chance to convince your plant to yield a huge harvest. There are a lot of factors that will contribute to the development of your plant, including:

Lighting: The optimum light cycle for the vegetative stage is 18 hours of light and 6 hours of darkness. If you’re not using a full-spectrum LED, make sure that your bulbs emit blue spectrum light.

Feeding: Plants need lots of nitrogen during the vegetative stage. Be careful not to overwater your plant.

Training: Use fimming, topping, and low-stress training to get your plant to expand horizontally into an even canopy. This will allow your plant to continue to flower without a protruding top bud getting too close to the grow lights.

Protecting: Monitor for pests and diseases. Neem oil is an excellent all-purpose, natural insecticide.

Step #8: Ace the Flowering Stage

You’ll need to make a few major changes to switch your plant to the flowering stage:

Change the light cycle to 12 hours on and 12 hours off, and switch to red-spectrum bulbs if you’re using a CFL or MH/HPS setup.

Give your plant a fertilizer with less nitrogen and more phosphorus and potassium.

Examine your plant carefully. Pests and mold can sneak into the center of your buds and ruin your crop.

Step #9: Harvest and Cure Your Buds

One of the biggest questions for beginner cannabis growers is knowing when to harvest. Some tell-tale signs that you buds are ready to harvest include:

The leaves start turning yellow and falling off.

Pistils turn orange or red and shrink.

The trichomes change from clear to mostly cloudy to amber. Use a jeweler’s loupe to inspect the trichomes.

It’s a good idea to read up on harvesting and curing while your waiting for your buds to mature. After all that hard work, you won’t want to ruin your crop with improper curing. You can find plenty of videos on harvesting and curing on YouTube.

Step #10: Enjoy the Fruits of Your Labor!

After your buds have cured for a few weeks, you can finally reap the rewards of months of effort growing your cannabis plant. Roll up a doobie or test your bud with a dry-herb vape to get the full flavor. Turn your leaves and trim into butter or oil for cooking. You can even make tea from the stems. Now that you’ve successfully completed your first one-plant grow, are you ready to turn it up the intensity and rise to step 11?

Recreational and Medical Marijuana News, Articles and Information: How to Grow Just One Indoor Cannabis Plant: 10 Steps to a Huge Harvest

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.


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:

5l pots:

2–3l pots:

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.


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 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 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.