Garden-Ish Quiz

[Aliw19]

Ngs Shropshire quiz, which includes cryptic clues to plant names (no answer length given). I've got one cryptic and one 'regular' question left. Any help appreciated!
Ques 68. Separate from the crowd (cryptic)
110. What is the opposite of estivation?

[Mamyalynne]

110 Hibernation.

[Mamyalynne]

Oh sorry, all plant names??

[JJ109]

110 Sunflower ?

estivation is dormancy in the summer/hot months
the "opposite" of estivation can therefore be interpreted as either hibernation, dormancy in the winter months, OR active in the summer months
Hence flowering in the sun!