Randall Jenkins said that even though marijuana plants can’t talk to you, they can still tell you something. “The tops that are starting to get a little bit of lockout,” Jenkins said. “You see there’s a little bit of yellow.” He said he’s learned this by growing marijuana for research at the Cleveland School of Cannabis. Growing takes training, he said, and there isn’t a one-size-fits-all approach. “There’s a thousand ways to do this,” Jenkins…