Pollination checklist Growing lights

15:00 Do not keep a hive closed for longer than one day unless additional pollen is fed to the bees. Bumblebee pollination of preferably at least 4 hours

Manual Growing lights

lead to a high relative humidity (RH). If the RH rises above 80-85%, the pollen is not released from the flowers and cannot be collected by the bumblebees [...] day. Never keep a hive closed for longer than one day unless additional pollen is fed to the bees. 2.1 When to open and close the hives In general, the