In the days following the legalization of recreational marijuana in Canada, HEXO was quick to send out a press release touting its ability to meet demand where other companies had fallen short.

Invictus MD Strategies Corp. (TSXV:GENE), established in 2014, is an international cannabis company offering several products under a wide range of brands.

In the early days of legalisation, James Burns was confident his company had enough product on the shelves of its five new cannabis retail stores, even though they only received half of their order from the provincial supplier.

Now, he has had staff refreshing the government supply website in the early hours to snap up scarce new stock as soon as it's available, and is considering restricting store hours.

"While there was product to order we were very comfortably getting a large amount of it," says Burns, the CEO of Alcanna, a company that owns a chain of private liquor stores in Canada and the US and, now, cannabis stores in the province of Alberta.

The pullback in the share prices of Canadian marijuana stocks has investors wondering which pot companies might be attractive to buy right now.

Let’s take a look at Cronos (TSX:CRON)(NYSE:CRON) to see if it deserves to be in your cannabis stock portfolio.

Aleafia Health Inc.(TSXV:ALEF), based in Toronto, is a licensed cannabis producer that owns Canada’s largest network of medical cannabis clinics. The Company describes itself as a seed to patient licensed producer. It has vertically-integrated capabilities that enable it to cultivate, process, conduct independent medical research and market through its clinics with a physician-led approach.

The Aleafia team is led by former government and law enforcement officials, expert growers, and successful entrepreneurs. With 22 clinics coast to coast in Canada, Aleafia has built a customer base of 50,000 patients.

Earlier this year, all the hype was around beverage companies and other industries looking to partner up with the cannabis industry. However, recently that excitement has died down a little bit as some big companies have poured some cold water on the idea.

Although many investors have felt optimistic about the future prospects of the Canadian cannabis space since the country moved to legalize recreational marijuana use last month, rising stock prices are far from a sure thing. Earlier this week, a prominent short seller revealed that he is making bets again the industry. On Wednesday, Andrew Left, author and editor of investment publication Citron Research, thinks Canadian Cannabis companies are destined to fall in the near future, he said on CNBC's Halftime Report.

When Canadian provinces across the country came up against shortages of marijuana in the first month of legalization, it was frustrating. But even more frustrating is that this current lack could last for years.

According to Khurram Malik, CEO of Biome Grow Inc., the shortage is not only due to delays in licensing, but is also partly caused by the strict regulations on the country’s 132 licensed producers and enforced by Health Canada. The time needed by cannabis businesses to come up with a product that’s not only up to par, but is also compliant is standing in the way as well. These are problems projected to persist into the foreseeable future.

The cannabis startup backed by former Speaker of the House John Boehner is set to become one of the most valuable companies in the U.S. weed industry.

Acreage Holdings is the latest U.S. cannabis firm to tap the public markets in Canada, where marijuana is legal, through a reverse takeover. The company raised US$314 million in a private placement that values it at about US$2.8 billion. Acreage shares are set to start public trading on Thursday.

Canadian police have not seen a spike in cannabis-impaired driving one month since legalization, but there needs to be more awareness of laws around storing marijuana in vehicles and passengers smoking weed, law enforcement officials say.

The Canadian Press canvassed police forces and provincial and territorial Crowns across the country and while some said it was too early to provide data, others said initial numbers and anecdotal impressions suggest stoned driving isn't on the rise.

"Even before the legislation we were catching a lot of high school kids because marijuana has seemed to be kind of mainstream forever," said Sgt. Joe Cantelo of the Kennebecasis Regional Police Force in New Brunswick.