Alex321
Guru
- Location
- South Wales
The conditions you see for bluebells in Spring can often be seen in Autumn. Why don’t we see examples of bluebells in the Autumn?
Because they need the cold spell of winter first.
AIUI, there needs to be a long enough spell of cold enough weather to cause a certain chemical reaction in part of the seed. And until that reaction has occurred, the seed will not germinate.
I don't know the detailed mechanics of what chemical this is, either before or after the reaction.