Why do woodland flowers like primroses start to grow in winter?

Why not...........

Why do woodland flowers like primroses start to grow in winter?
maybe they are only capable producing flowers in this climate.............
Reply:Their flowers are meant to attract insects, producing flowers meens the plant needs more energy, both are best served when the trees above have no leaves, and let most sunlight get to the ground while the insects are more likely to see the flowers, for the same reason.
Reply:Unfortunately, it is the time of the age that global warming and climate change is having on the gardens of the UK.

Winters now end approx. 2 weeks before Mar 1st and due to the increased temperatures these recent winters, that your primroses are sprouting earlier than usual.
Reply:To give them a head start, they are low to the ground so if they grew later in the year they would be dwarfed by other plants / weeds and get no sun, they've found their niche I guess
Reply:yes
Reply:They need sunlight and in spring when the trees put out leaves, the ground is in shade.
Reply:There are lots of seeds and plants that need cold to germinate and grow. Although I am not sure, I think this is because cold weather puts off insects or pests that may eat the young shoots of the plant trying to grow.