Manual Growing lights
January 1, 1970
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 (no
pollination).
Moreover [...] advise to place the hives high in the greenhouse (above the crop) –
especially from week 40 until week 9 (depending on the amount of daylight that is available) [...] walkway under the gutter
(according to Koppert’s general placement advice).
From week 40 until week 9, it is also important to make sure that the bumblebee