Hi I'm from H.N, keeping bee's in the UK. This my first year, cedar hives are fully insulated, top & 4 sides, winter here lasts 6 to 7 months, getting the colony thru to spring is paramount, feeding fondant with pollen in, bee's are flying on warm days,10c bring in pollen from hazel and early woodland flowers, I have lost 1 hive, not big enough to generate enough heat to keep them warm.