Thread:KusaNin/@comment-33263612-20180227175726/@comment-25156300-20180302000018

Ok. So that helps narrow things down. Your techniques can focus on herbs, roots, etc. for medicine.

One route you could go is to not make it a kekkei genkai. Shadow Possession, Mind Transfer, and Expansion techniques are kept within a clan, but aren't actually kekkei genkai. They are just 'Hiden' techniques. I think this route could work well for what you want (then you don't even have to worry about Flora Release). Ninja Art: Herbal Expansion... or something like that. Then have various types of plants for individual techniques, like how Shadow Possession has Strangle, Stitching, etc. (I actually went this same route for my Wood Manipulation technique.)

If you want to go the Nature Release route, then you can just focus the effects around herbs and medicinal plants. This route may be a bit harder, since you will want to keep the attacks different enough from Flora Release.