You are probably going to get a few different opinions on the matter. Everything I have read does not indicate that CBD oil is legal. Yes, the Farm bill did legalize hemp but you can get CBD from both Hemp and Marijuana. That and I've heard some hemp growers who find they have to high levels of THC will process the CBD and sell it. Way too much hand holding, certifying and work for it to be worth it in my world. Best of luck.
A successful man is one who can lay a firm foundation with the bricks others have thrown at him.