A How to Guide on Growing Weed Indoors

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Legalization is coming; are you curious about how to grow cannabis inside?

I’m happy to say that anybody can grow weed indoors using certain fundamental tools and some knowledge gained from this article.

You should know that there are two misconceptions about growing marijuana indoors, the first misconception is that it’s simple to grow weed indoors. The second misconception is that it’s extremely hard.

Fortunately, nearly anybody that is dedicated can grow weed indoors. All you need is a little effort and planning!

Our Guide to Growing Cannabis Indoors

Choose a Grow Space

Before you start growing weed indoors, you’ll need to choose a room that people don’t frequently visit. This applies to people who live anywhere, regardless of marijuana’s legal status. The fewer people who know about your growing habit, the better for your plants. When you are selecting an indoor grow space to grow cannabis at home, ensure your choice is based on air circulation and vertical height.

Example of a grow space

Example of a grow space

Air circulation is very necessary for plants because it makes them relax. If you lock up your plants in a closet with no air, its growth is going to be restricted. It is important that your plants get good air circulation because your plant will languish without fresh air. That is the reason why fans are very necessary for an indoor grow space. If you put fans around the grow space, they will provide enough fresh air for your plants.

Vertical height is another factor which influences the growth of plants, especially when you grow indoors. In order to develop vegetatively, you’ll require enough vertical space. The vegetative phase of growth is when the plant turns into a flower. However, if you have limited vertical space, you can successfully grow weed indoors by cropping, pruning, and training.

Choose a Grow Light

A grow light

A grow light

When it comes to lighting, there is a wide range of options available for you to choose when growing weed indoors. The best kinds of grow lights include high-pressure sodium (HPS), metal halide (MH), light-emitting diodes (LED) and compact fluorescent lights (CFLs).

You have to be very discreet when selecting the light because the wrong growing light can make the grow space too hot for air circulation. If you have a small grow space, then you should avoid high-intensity lighting, for example, HPS and MH. However, LED or CFL lighting can keep your grow room temperature under control, as these run much cooler.

If you plan on saving some money on electricity, then LEDs are the best bet. They don’t require much power as compared to other types of lighting. Many first time growers prefer CFL lighting since it’s more affordable than LED.

Choose a Grow Medium

There are three mediums for growing weed. The one you choose will impact how you should take care of your plants. The three mediums for growing include soil; coco coir fibre; and hydroponics.



Most first time growers begin with soil because it’s easy to use. You’ll need to get high fertilized soil depending on your budget. Expert growers should be able to recommend the best soils for indoor growing. Try not to use pots under 5 gallons, since you’ll need to give the roots some space to grow.

Coco coir fibre and different soilless blends act as a medium in which the roots can anchor the plant, without the use of real soil. Coco is reused and processed natural fibre from coconut husks. It has a pH of 6.5 and 7.0 which makes it similar to unfertilized soil. It is better at draining and keeping roots oxygenated as compared to most peat-based soils. Hence, most growers combine cocoa and soil in a mix.

Hydroponic growers mostly utilize well oxygenated, nutritious water. The nutrients received by the plants are provided through the water by adding a nutrient solution. Due to this, the plants can spend less energy on developing roots and searching for nutrients, and instead use this energy for vegetative growth and flowering.

Choose a Nutrient Regimen

You can use two types of fertilizers when growing cannabis, including organic and chemical. Both of these fertilizers contain nutrients such as nitrogen (N), potassium (P), and phosphorus (K). Believers of natural gardening trust that organic nutrients can offer superior taste, smell, and effects.

Cannabis Nutrients

Cannabis Nutrients

Differences in pH have a big impact on your plants. The best soil to grow cannabis is one with a pH level between 6.0 and 7. Soils with a pH level lying outside that range tend to have fewer nutrients. This is presumably the most widely recognized problem experienced by firsts time growers who attempt to grow weed indoors. In order to measure pH, use collective water. You can also use digital pH pens or measurement kits to measure the pH level.

Hydroponics setups will require nutrient mixtures specially made for them. Original hydroponic growers check their pH no less than two times per day and rapidly make adjustments. They shoot for a fundamental pH of 6.0, enabling the plants to flower in the vicinity of 5.5 and 6.5.

Choose the Right Strain

Cannabis Seeds

Cannabis Seeds

It is good to consider good genetics as an important factor when growing weed indoors. Regardless of how much effort and care used in growing a plant, you can’t surpass the genetic limitations of its parents. If you choose the best genetics, then you will probably have a fruitful harvest. When selecting cannabis seeds, look for reputable seed banks, such as Zamnesia, that offer a wide variety of strains to choose from.

Keep in mind the vertical space factor while picking a strain. If you lack vertical space, then decide on an indica strain. They have a tendency to be short and squat, making them perfect for little spaces. On the other hand, Sativas can grow up to eight feet or more, making them very tall. They can be grown in small spaces, however, that needs extensive cropping, training, and pruning.

Induce Flowering

During the vegetative stage, it is preferable to allow your grow light on for 18-20 hours every day, which is the initial stage of a plant’s life cycle. Furthermore, the plant needs to get a 12-12 schedule of light and dark when it’s time to flower.

Based on the strain you choose, the flowering procedure can take from 6 to 12 weeks (most take 8 or 9 weeks). Indica plants incline toward the shorter end of that scale.

We hope you found this helpful. Happy Growing!

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Last Updated on July 12, 2023 by Bud

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