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how to grow medical cannabis indoors

How to grow medical cannabis indoors

Date: September 15, 2021
Read time: 6 minutes

Medical marijuana patients 18 years and older will be able to grow up to 3 mature and 3 immature plants at home starting October 1, 2021, with a cap of 12 total plants per household. All adults over age 21 will be able to grow under the same rules starting July 1, 2023. Plants must be grown indoors and must not be visible from the street. People who choose to grow their own plants must do so in their primary residence and where individuals under 21 can not access the plants.

Can I grow cannabis at home?

How to grow medical cannabis indoors

Cannabis analytical labs are becoming more professional. “I’ve seen an evolution in the sophistication of the industry,” Brauninger says. “Most of the people running labs now have PhDs and experience in the pharmaceutical industry. It’s light years more sophisticated than five or six years ago.”

Many of his postgraduate students, he says, receive job offers from cannabis companies before they have even completed their studies. Zheng will begin teaching a cannabis production class for undergraduates at the University of Guelph in January 2020, and several colleges in North America already offer courses designed to provide skilled workers to the industry. In April, the first 24 students graduated from an 8-month cannabis production course at Niagara College Canada in Niagara-on-the-Lake. That course, intended for students who already have a diploma or degree in plant science, focuses on how to grow cannabis and the surrounding regulations. Bill MacDonald, a plant scientist and the programme’s coordinator, says that the graduates were snapped up by industry.

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Testing, testing

Although many small-scale cannabis growers at first questioned the need for intensive product testing, most can now appreciate the benefits that the rules bring to the market. “People see the need for quality control and testing,” says James. “It brings a legitimacy to the industry that hasn’t always been there.”

Nature 572, S10-S11 (2019)

Cannabis companies are quickly adopting techniques and technologies that were pioneered by commercial agriculture and horticulturalists. Organigram, a cannabis producer in Moncton, Canada, stringently controls its growing operations, says Jeff Purcell, vice-president of operations. “The growing environment is standardized, and we have full control over the air, light, temperature and fertilizer,” he says. “It’s all highly automated and computer controlled.”

A2LA is also helping labs to attain ISO/IEC 17025 accreditation, the main international standard for testing and calibration labs. It covers all phases of lab operation, including staff training, data protection and dealing with conflicts of interest.

Independent testing labs have sprung up to help growers to meet the requirements, but like the wider cannabis industry, they face growing pains. “At the moment it’s a bit like the Wild West, with different rules in different places,” says Andrew James, marketing director of Ellutia in Ely, UK, which makes chemical analysis equipment for the cannabis industry, among other markets. “It can be hard to know what to test for, how to test and where to do it.”

How to grow medical cannabis indoors

At the end of the day, you want to grow a strain you like. A single plant can yield between a half-pound and a full pound of dried buds, depending on how big your plants get, so you’ll have a lot of it come harvest time.

Note that “mature” plants are those in the flowering stage, when plants begin to produce buds; “immature” plants are those in the vegetative stage, before they produce buds. A “household” is defined as two or more people living at a single residence.

You might be surprised which states don’t allow homegrowing—only five medical states and one medical territory allow homegrowing at all, and some adult-use states require a medical card.

Before you get started growing, you’ll need to see if you even can grow in your state. Below is a list of states in which it is legal to grow your own marijuana at home, both states with medical and adult-use legal status. If your state does not appear on this list, it is not legal to homegrow in your state .

Indoor vs. outdoor marijuana growing

Growing weed indoors is more expensive because you’ll need to spend money on equipment and utilities, but you can control every aspect of the grow environment and set up an indoor grow almost anywhere. Expect to grow some killer weed—indoor is known for its potency and quality.

Enjoy, have fun, and learn a tip or two—growing weed is therapeutic and relaxing, and there’s nothing better than smoking weed you’ve grown yourself.

The best way to get quality buds and big yields is to grow strong, healthy plants. Here’s a quick rundown of the most important things you need to know about growing weed:

Quick overview of the basics of growing marijuana

Because the plant was illegal for so long, a lot of grow info has been passed down by word of mouth. There are many myths and traditions about growing weed, so it can be hard to sort good, sound advice from hearsay. Also, because it was illegal, there’s ample information on indoor growing and how to get the most out of a small space by maximizing harvests and training plants.

Check out our Guide to marijuana legalization for more details on homegrowing in your state.