What is a word for a long period of hibernation before growth?
dormant:
1: marked by a suspension of activity: as
2: temporarily devoid of external activity
3: temporarily in abeyance yet capable of being activated
The seeds remain dormant, waiting for spring.
How about suspended animation?
latent
(Biology) Undeveloped but capable of normal growth under the proper conditions: a latent bud.
quiescence
quiescence: seed dormancy, a form of delayed seed germination