Plant requiring small switch in a range of growing conditions? (8)
I believe the answer is:
clematis
'plant' is the definition.
(type of plant)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for clematis that I've seen before include "Ornamental climber" , "Ornamental climbing plant" , "flower" , "Old man's beard" , "Popular climbing plant" .)