Herbs - literally just for flavor in a room (get it?) but would love some like little herb plants to have in kitchens and just to add some non-bloom plants that still have smells. Also fun flavor for badlands travelers.
Succulents/Cacti- Badlands harvestable or buyable, just a less floral growable plant. Maybe need to be gotten in a plot or non-buyable way to make them generally hard to handle, or require non-city temps to survive.
Vines and Trees - Not necessarily for player consumption, but I enjoy the few larger plants that are items around the game, and would love them to fall under the same mechanics as the flowers for smelling, coloration of leaves, etc.