By 2022, the North American legal marijuana revenue is estimated to reach $28.9 billion and will be responsible for about 90% of the global legal marijuana market, according to The State of Legal Marijuana Markets, 6th Edition. Presently, nine U.S. states and the District of Columbia have legalized adult-use recreational marijuana, while thirty states have legalized it for medicinal purposes. In less than a month, Canada will become the first G7 country in the world to flip the switch and launch recreational marijuana sales. The report also revealed that sales will extend to $47 billion over the next decade, which some analysts predict as marijuana continues to go more mainstream, these numbers could go even higher. The North American Marijuana Index, which tracks the leading marijuana stocks in the U.S. and Canada, has seen substantial growth this year. The index is up over 205% over the last trailing year, trading near all-time highs. North American Marijuana Index Top 5 Holdings By Market Cap: Canopy Growth Corp. (CGC) (WEED)Aurora Cannabis Inc. (ACBFF) (ACB)GW Pharmaceuticals (GWPH)Aphria Inc. (APHQF) (APH)Cronos Group Inc. (CRON) As the marijuana industry continues to bud, here are three marijuana stocks to consider planting in your portfolio.Click Here For Top 3 Marijuana Stocks To Add To Your Watch-List