Yea - I have too. You got to do what you got to do...
I have to ask - How long is the season in Finland?
There is no flowers in April
Willows start blooming about 1st of May and brooding can start.
Hives are ready to get yield about 25.6 when raspberry starts blooming.
Those hives mut be wintered in one box or in two box. Boxes are very full of bees after winter, if they are going to harvest yield in June.
Willows bloom 1.5-28.5.
Dandelion 28.5-10.6.
Spring rape blooms about 25.6-15.7.
Fireweed blooms about 10.7-27.7
10.8 all essential blooming is over.
During first week of September the hives must be feeded. If it goes later, bees cannot cap the food.
Winter feeding is made with 1:2 syrup. Most hives winter in one box. On average the hives consume 20 kg sugar during winter from September to May.
Average yield is 40-80 kg. Years are different. Good yield comes from pastures. Migrative beekeeping is important. Hobby beekeepers use to get better yields, even douple compared to professionals. it depends how many hives are in one spot and how good pastures you may select.
There are areas where hive density is too high and there are not enough pasture to efficient harvesting.
If I have weak hives at the beginning of main yield, I join them, when I move them to rape fields or to fireweed woods.
Professionals start winter feeding at the first half of August.
Most common bee is Italian. Carniolan is favorite and Buckfast. Black bee is practically zero.