Here's an interesting article, 2 of the largest companies in Canada have experienced crop failures, I've pasted some parts below. If you google it, you'll also find many companies have their crops destroyed because they fail the pesticides testing.
https://seekingalpha.com/article/4211897-canadas-pot-legalization-going-big-mess?isDirectRoadblock=true
"Aphria.......The company cited labor shortage at its greenhouse which resulted in the destruction of one week's crop"
"Aphria's production challenge is compounded by recent speculations on the internet that Canopy (CGC) had experienced a massive crop failure at its B.C. greenhouse facility."
Note these 2 companies are the 2 biggest MJ companies in Canada
Maybe they need a less labour intensive, non pesticide using system that guarantees repeatable performance. Wonder who does that?