Growing Marijuana Indoors: How to Grow Marijuana Indoors | Medical Marijuana Help

Growing Marijuana Indoors: How to Grow Marijuana Indoors

With growing social acceptance of marijuana as a plant that packs a serious medical punch, it is now easier than ever to acquire marijuana. From online dispensaries to medical marijuana centers, medical marijuana smokers (or eaters or drinkers) can now access cannabis with an unprecedented ease and without fear of legal retribution. However, some people may still wish to go right to the source and grow their own marijuana plants from marijuana seeds.

Should you decide to grow your own marijuana seeds, you will reap certain benefits. You can pick your own strain, be confident in what you’re smoking, and be rest assured that no pesticides have touched your product. You also have to be cautious and consider a few factors. First of all, growing marijuana is not legal everywhere. Ensure you acquire proper licensing if required and NEVER grow more cannabis plants than is legally permitted. You also need to take into account your surroundings. In Canada and much of the United States, it is impossible to grow marijuana outdoors all year round. Growing outside also leaves many factors out of your control and you leave your plants vulnerable to pests as well as thieves. This guide to growing marijuana indoors will serve to provide you with the basics of growing indoors, as well as the pros and cons of becoming one of an increasing number of marijuana growers.


Light is the most important factor in growing your pot plant. Although cannabis grows quickly and easily, it is vital to your plants that it be exposed to enough light to keep it from flowering. Your pot plant needs at least 16 hours of light a day to prevent flowering. For one plant or a small number of plants, you can use a specialist grow light or the same types of lighting that you would use to start seedlings for your outdoor garden. These indoor lighting systems can be found at any garden center and are pretty affordable. Incandescent lights and High Intensity Discharge lights or specialist grow lights are your best bet when selecting a light for your indoor marijuana garden. Alternatively, you can expose to natural sunlight during the daytime and then substitute missing hours of light with fluorescent lighting. This lighting selection should only be used if your plant is receiving a decent amount of natural light since fluorescent lighting generally has a relatively low brightness output. As previously mentioned, light is essential to your plant. If your plant flowers too soon, the harvest will be small and essentially useless.

Marijuana under indoor lights


Like any other plant life, your cannabis plant will require water in order to grow. In addition, like other plants, you can easily kill you marijuana plant by over or under watering it. Although cannabis is a resilient weed, it requires a good amount of water to survive (especially if it is sitting under a lamp for most of the day), but over-watering can cause the formation of mold around the stem and roots. The key to appropriate watering is to let the soil dry out to prevent moisture related disease, but never to allow the roots to begin to dry. We recommend watering about once a day. Two smaller watering sessions a day may be appropriate for younger plants. To assess if your plant needs to be watered, stick your finger a couple of inches into the soil. The top should be dry but the soil that your fingertip is touching should be moist. Water your plant until you see a small amount of runoff from the bottom of your pot. This indicates that the soil has been properly saturated. There is a fair amount of debate surrounding this, but we recommend watering the plants in the morning, about half an hour before you turn on your lights.

Pots and Soil

The key to selecting an appropriate pot for your pot is to select one that is of the right size and has well-drained soil. A plant without well-drained soil is usually doomed: Water gets trapped in the bottom and begins to fester, making your plant sick. To ensure proper drainage, make sure you are using either a fabric pot or a pot with lots of hole in the bottom. Put a tray under the pot to prevent a mess. You also need a pot that is big enough to allow your plant’s roots to extend.

Marijuana Plant in a Pot

For a first-time indoor pot grower, store-bought soil with all the right nutrients is your best bet. It’s not as finicky as making your own and you don’t have to be nervous about your composition being off. You can also use plant food and processed manure or other nutrient solution to add nutrients and enrich the soil. It’s important to remember that both manure and compost need to be broken down in order to be digested by a plant.


When your plant is large enough, you will want to trigger its flowering cycle. To do this, you need to change the amount of light you are providing your plant. While you plant was receiving a minimum of 16 hours a day of moderate light, it now needs to be receiving 12 hours a day of the highest intensity light possible and 12 hours a day of darkness. An essential part of the flowering process is to not to allow any light into the plant’s vicinity while it is in the dark. Treat it like a photography darkroom. Your buds will be ready to harvest about 8-10 weeks after they begin to flower. There will be a couple of indicators that they are ready to harvest:

  1. The leaves will begin to yellow and fall off
  2. The pistils will start turning from white to brown
  3. They will start to STINK!

Congratulations on your first pot growing experience! Growing cannabis isn’t rocket science. It’s called “weed” for a reason and that’s because it grows quickly and easily, being highly resistant to disease and problems in its vegetative state. During the flowering period, your marijuana plant will be a little more finicky, but with a little TLC and some help from this guide, you should have no problem making medical marijuana at home.

Jason Duke

As a disabled veteran I have been through years of therapy and treatment and I have seen the toll prescription pain medications can take on you and your family. Now years later and an advocate for Medical Marijuana I'm the founder of a website dedicated to providing accurate information on Medical Marijuana uses, the laws, and the strains. I'm a firm believer that marijuana can help millions of people and deserves its proper place in mainstream medicine.