Indoor Cannabis Growing Methods

Indoor Cannabis Growing Methods

For a lot of us, especially those who don’t have the luxury of living in lovely warm climates, indoor growing is the way to go. Growing indoors means being able to control the temperature, the humidity, makes it easier to ensure insects don’t get to plants and control the light cycles. This means growers generally find it easier to keep their plants happy and healthy. However, when it comes to indoor growing, there are a few different methods available. The basics to look into first of all is whether or not we want to grow using soil or using a hydroponic system.

Soil Growing

This method is often recommended for beginner growers as it requires the least setup and fewer bits and pieces. It can also produce fewer setbacks if anything goes wrong outside of the grower’s power. For example, if the grow space loses power the plants are less likely to die immediately. It is important to ensure that we start off using a big enough pot, give that plant plenty of room to spread out. 7-gallon pots are usually recommended to ensure transplanting will be an easy process.


The first thing we will need when we are growing indoors is a decent space. Many growers, especially those who are experimenting with first time growing, use an enclosed space like a large cupboard. They tend to be excellent for completely blocking out light which is extremely important. Most cupboards are also pretty airtight but pretty easy to install an extractor into. Many growers also recommend grow tents, if there is space to set one up. Grow tents are specifically designed to house marijuana plants. They provide fantastic ventilation, reflect the light well and easily support grow lights.


Choosing soil can be a tricky one as there is quite a lot to consider. It is possible to buy soils specifically created to help cannabis thrive. However, for the growers who don’t have access to a speciality shop loam is an excellent soil that can be purchased at most garden centres. Some growers recommend mixing soil to ensure the perfect balance for the plant. However, this can take quite a long time so for beginners, it is likely better to purchase potting soil. Organic potting mixes tend to be better as they mimic natural soil conditions and will give the plant all the nutrients it needs.


Setting up and indoor soil grow room is relatively simple. We simply need to create a controlled environment using lights, a carbon filter, and depending on where the weed is being grown there may need to be a heater involved. 20 – 30 degrees celsius is around the temperature it needs to be for plants to thrive. The plants will also need decent humidity which changes through the light cycle. Finally, we will need fans to ensure air circulation and drive off mould and mildew.

Soil growing is definitely the easiest method for beginner growers, even if it doesn’t necessarily yield the best results. However, this very much depends on the set up available.

Hydroponic Growing

Hydroponic methods use water instead of soil and are often thought to give the roots more freedom and nutrient circulation. This method is usually reserved for slightly more advanced growers. This is primarily because it requires a lot of kit and can be quite expensive. It is also a little more complicated and growers have a lot more to pay attention to while ensuring the safety of their plants. There are a few different hydroponic methods but today we will focus on the basic aspects of hydro growing.


For indoor hydroponic growing, we will need a good deal of gear. We don’t need to go into everything in this article but we will at least need a decent sized grow space, hydro trays, a hydro tower, lights, a heater, fans, soil, nutrients and additives, filters, humidifier, dehumidifier, ventilation, ducts, pumps and a few other set up specific bits and pieces. This may sound like a lot but all of it is necessary for top quality hydroponic plants.

Since there is simply too much to go into with hydroponic systems, and I will sort a full article covering all of it, let’s just look at the pros and cons.


Hydroponic systems allow the plants to really spread its roots. This usually produces healthier, more vigorous plants who are far less likely to come into contact with bugs, pests and mould. It also avoids issues such as soil born diseases and will generally produce far healthier plants. Also, growers are able to completely control the nutrient balance going to their plants. This means there is no chance that the plants won’t get everything they need, as is possible with soil. It also means that growers can alter nutrients to fit the strain itself.


As I mentioned earlier if there is a power issue on the grow site the plants will die pretty quickly. Power outages mean the water will not be cycled, the plants will not be ventilated and the roots will sit and become stagnant. This means putting in some kind of back up system to ensure auxiliary power. It will also require a higher level of experience as any mistakes made can have catastrophic effects. Soil allows for first-time growers to mess up a little and still get pretty decent results. Hydroponic has to be carefully carried off to ensure plant survival.

So overall the results of hydro growing can be absolutely fantastic, but there is a good deal more that can go wrong. For those confident with botany and similar systems, it is definitely the way to go.

Hopefully, this will help potential growers figure out what kind of route they want to go down when it comes to their new crop. Next, we will be looking into specifics of hydroponic methods so watch this space.

Remember: It is illegal to germinate cannabis seeds in many countries including the UK. It is our duty to inform you of this fact and to urge you to obey all of your local laws to the letter. The Vault only ever sells or sends out seeds for souvenir, collection or novelty purposes.

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