[binrec]

> I thought all plants (by definition?) need photosynthesis to stay alive in non-dormant states.

There are parasitic plants that don't photosynthesize at all, like the Monotropoideae and Rafflesiaceae.

Among photosynthesizing plants, rhubarb can be "forced" (grown in complete darkness to reduce bitterness and get an earlier harvest), and potatoes can sprout if left in the pantry for too long.