How to Grow Medical Marijuana Seeds in Canada


Cultivating your own cannabis seeds gives you more control over the quality of your marijuana strain stash. In addition, many cannabis strains are only available in seed form. The only way to enjoy these strains is to take the time and effort to grow their seeds.

If you are looking to produce your own marijuana stash, let us help you with our guide. We will break down the things you need to consider when growing your medical marijuana seeds in Canada.

Medical strain

The most important step to take is to consider which seed to cultivate in your garden. Every marijuana strain has a different effect on your body. Because you want to cultivate a seed for your medical condition, you will want to pick a strain that will benefit you more. For example, CBD rich strains are great if you need pain relief. Another example is indica strains, which are effective against intense stress and insomnia.

When you have a list of strains in mind, the next factor to consider is their plant characteristics. Cannabis seeds have different flowering periods and height. Some are highly resistant against common diseases, making them suitable for outdoor cultivation. Certain strains might emit a strong odor that can attract unwanted attention to your home. Plant height is also important to consider if you have a limited amount of space in your house. By going through the different characteristics of a strain, you can find one can cultivate with your current experience and garden equipment.

Growing medium

The growing medium of your plants is a necessary part of your garden. These need to hold just enough water to keep the plants from drying out but does not hold in too much liquid to drown the roots. A proper medium must have a proper airway to bring in oxygen to the roots.

One of the most common medium to use is garden soil. These are readily available in any gardening store and are easy to use. A proper soil should have a 25 to 30 percent mix of perlite or other soil conditioners. These small pebbles create space within the soil for drainage and ventilation. Make sure to pick soil that already contains the basic nutrients a seedling need for growth. If you are making homemade soil, you can add around 30 percent compost to give the medium its nutrients.

Other popular options are soilless mediums such as coco coir. Coco coir comes from the fiber husk of coconuts. The husk has better drainage and ventilation than soil. You can further improve this with the addition of perlite or clay pebbles. On the other hand, coco coir can attract certain pests such as fungus gnats. If you pick this medium, you may want to invest in a pest preventive measure that is non-toxic.

Lighting condition

Light is an important factor to a plant’s photosynthesis. Without sufficient lighting, your plants will not have the energy to turn carbon dioxide and water into growth fuel. In addition, plants use the lighting schedule to determine whether to move to the next phase of its growth cycle.

If you decide to cultivate your plants outdoors, you need to be aware of the daylight hours in Canada. You will want to germinate your seed around the middle of spring or May. This will make your plants enter the vegetative stage at the start of summer when the days are longer. By the time autumn comes with 12 hours of day and night, your plant will grow healthily as they enter the flowering phase. Timing is key to have your medical marijuana seeds make the most of the climate in Canada.

Indoor cultivation allows you to be flexible in the lighting schedule of your plants. You can have the daylight hours of summer at your house in the middle of winter. You also have the option to force the plants to enter the flowering phase early than normal. This will cut their growth size short and allow you to harvest their buds early.

If you are on a budget for your grow room, fluorescent lighting is sufficient for your plants. These fixture costs less and can fit in any grow room. If you want better lighting are HID grow lights that are also easy to set up. However, HID fixtures tend to get very hot. You will need a cooling system for this setup to keep the lights and your plants from overheating. When your wallet can handle it or if you are looking for a long-term investment in your indoor garden, consider a LED system. These fixtures emit a powerful light than fluorescent that plants enjoy and do not produce as much heat as HID lights.


Carbon dioxide is necessary for plants to live as oxygen is important to us. Cannabis plants thrive well when they have a fresh supply of carbon dioxide flow around them. With this in mind, the indoor garden requires an effective ventilation system that circulates the air around the plant.

In addition to providing your plants with a steady amount of fresh air, a good ventilation system can control the humidity of your grow room. This helps prevent diseases caused by large amounts of water in the air. In addition, a good airflow keeps the temperature of your garden at an optimal range to prevent your plants from overheating.

You can keep your ventilation simple and inexpensive by utilizing an exhaust fan. The fan removes excess heat and stale air within your garden and draws in fresh cool air. For large rooms, it is a good idea to use two fans for both the intake and exhaust unit of your ventilation unit.

If you are using an HID light fixture for your grows room, you will need to utilize an air conditioning system to control the heat. Most breeders utilize a split air-conditioning unit that is flexible enough for various grow rooms. In addition to providing ample airflow in the grow room and temperature control, a good air conditioning system can also control the humidity of your grow room.

Harvest timing

When the last few weeks of your cannabis plants arrive, they are nearly ready for harvest. You will need to keep a close eye on your plants during this period because timing will be key to the quality of your medical marijuana bud. Harvesting your plant early will leave you with a strain that barely has any cannabinoids to treat your medical condition.

The keys to the harvest timing of your plants are the trichomes and pistils surrounding it. The trichomes look like sugar crystals from a distance but are actually small sprouts with a bulbous top. Pistils are the white hair shooting out of the flowering area.

With a magnifying glass or a loupe for jewelry, check on the color of all the trichomes on your cannabis plant. If majorities of them are clear or have a glass-like quality, the marijuana bud is not yet ready for harvesting. Wait until around half or most of the trichomes have a white cloudy color. This is a good indicator that the buds have a sufficient amount of THC and another essential cannabinoid.

Another way to check on the harvest readiness of the buds is to look at the color of the pistils. As the plants funnel cannabinoid from its foliage to the buds, the pistils turn brown and curl up. If around half or more of the pistils around the plant are brown, the buds should have a good amount of THC and another beneficial cannabinoid.

Some breeders intentionally harvest their buds much later than usual to achieve a different result for their strain. Over time, the THC component of an unharvested bud will turn into CBN. This cannabinoid is a potent sedative that can efficiently reduce anxiety and eliminate insomnia.

To achieve a bud with large amounts of CBN, the trichomes around your plant should have an amber color at the top instead of a cloudy white color. In addition, nearly all or 90 percent of the pistils should be brown and curled.

Upon harvesting your buds, cut any extra leaves, and allow them to dry for three to nine days. When they feel dry and slightly moist, place them in a mason or glass jar. Leave the bud in the jar for around one to three weeks. Open the lid for two to three hours each day. If the bud it is dry and with a small amount of moisture on the surface, it is ready for consumption.


By now, you now know the important factors when it comes to cultivating medical marijuana seeds. Breeding these plants can be a rewarding and therapeutic experience for people with various diseases and medical conditions. As Gary L. Wenk Ph. D has said, “marijuana might actually help your brain, rather than harm it”.

Leave a Reply

Your email address will not be published. Required fields are marked *