@Mr Allen J lol

Well, I think you could still could though. You just won't be as strong as you would have want. I mean, doesn't take much to be a plant. You'd just have all their weaknesses and stuff and none of that super regeneration or the stuff about "She can turn her body into any plant or vegetation imaginable, shaping it into weapons, extra-limbs, and so forth." That's just OP.

Chlorokinesis is fine though

• Here ability would be classified as a Mutant-class Quirk.
• She can have plant-like physiology. Instead of food, she would need water and sunlight.
  
  • She doesn't need oxygen so breathing wouldn't be a problem. Like what you described earlier, she can passively absorb carbon dioxide for respiration.
  • Her skin would appear green or plant-like in appearance. I guess her eyes too, if you want.
  • She can have cholrokinesis, just don't go overboard.
  • Recovering from injuries and lost body parts is achievable, but nothing instantaneous. It's a gradual process, but being able to recover a lost limb is a power by itself.
  • The only parts she can alter in her body would be her arms, which can transform into tendril like vines that she can control. Her feet can allow her to root herself to the ground, absorb nutrients, and whatnot.
  • Like plants, she'd be weak against extreme temperature.

@Mr Allen JNeither did I. Just wanted to point out that it should be more of a weakness than something she can just casually tolerate. Even normal people are gonna have a hard time melting snow with just body temperature. lol

Yeah, there are probably plants that can survive in the cold or extreme heat, but what I was going for what general plant-physiology and not all the goodies all plants, if not most, are capable of.