I seem to recall that OSR needs 14 degrees to yield nectar. On a sunny day and little wind, the plants should get to that temperature even if the air temperature is less. But 'little wind' is not your part of the world!MickBBKA wrote: ↑20 Apr 2022, 21:18Went back to my inland apiary as I forgot to take queen excluders last week and pleasantly surprised to find 4 colonies with a full super each after 4 days although not capped yet and no OSR there.
In my local area the colonies are very big but despite huge seas of OSR and billions of dandelions they are not touching any of it. Temps have dropped massively over the weekend, frost last night and its gonna happen tonight as well and only highs of 11/12c forecast for the next 2 weeks with the East winds of death from the sea. I know OSR requires warmth to create nectar but do dandelions require it to be quite warm as well ? I have never seen so many but walking amongst them there isn't a single pollinator to be seen and bees returning with pollen are not bringing it in. Taking 5 more colonies inland on Saturday.
Also got chance to change out the rotting outer frames from my Abelo poly hives today.
Last year, on the East Coast as you are, I only had 1 week of OSR as the weather was too cold for it to do anything useful.
May your bees read the same books as you do.