I used a pollen substitute last spring (end March) .I’m not near OSR (oil seed ****) and my first spring flow starts mid to end May. So working backwards I reckon if my bees need help it will be 6 weeks earlier ie end March (takes 6 weeks from queen laying eggs to becoming foragers)When and under what circumstances should pollen be fed to a hive of bees?
Is it something that some beekeepers do routinely in the Spring as a safety net or to boost brood rearing?
As my home apiary is at altitude in the Pennines and near the heather, I felt my colonies needed help as spring was late, so the pollen was late too and my home apiary is 3 weeks behind the valley. I had colonies in the valley too. All had a pollen patty end March
I had the best honey crop last year (now 5 years of beekeeping). Each year has got bettter than the last and last year was +60% higher than the previous from the same number of production colonies, so perhaps the pollen helped. Plus like you I am learning lots and maybe becoming better at what I do….
I will repeat using pollen sub again but only if spring is late and pollen is not in full supply. I have never fed syrup in spring to stimulate the queen as I believe it’s best work at the bees pace. They know what’s happening re the weather and build up accordingly. I will be watching the weather and the available forage and make my decision s accordingly
I bought ultra bee in the summer sales with a long code life (planning ahead!) & will freeze if I don’t use
So in summary, think about your location, when your queen needs to be laying to make the most of your first nectar flow, work backwards and make your judgement according to your location, weather and forage. Don’t over stimulate your queens with syrup unless you are migrating your bees to oil seed ****.
Just a few thoughts from me to add to the melting pot!