Spring time comes when the temperatures rise over 10 degrees celsius. The bees will become active then and need pollen for their new larvae. It is important for the bees to have access to hazelnut pussywillows and other early pollen producing plants. If bees can't collect their own pollen due to rain or cold temperatures, beekeepers provide pollen patties.
Every beekeeper does this differently. Please share your pollen patty recipe or what you do at this time of year.