SourwoodGrace · North Carolina, US · Gear · Sep 25, 2026
Overwintering a 5-frame nuc — insulated nuc box, on top of a strong colony, or push it into a full hive?
North Carolina, third year. I made a late split in August with a mated queen I'd bought, and it's now a decent five-frame nuc: three frames of brood, two of stores, good queen, mites washed at 1 per 300 last week. Not enough bees to fill a deep though, and it's late September.
I can see three options and I've heard people swear by each. One: leave them in a nuc box and insulate it — I could buy a polystyrene nuc or build a double-walled one. Two: sit the nuc on top of my strongest colony with a double-screen board so they share heat. Three: move them into a full ten-frame deep and use follower boards or just let them cluster in the middle.
Our winters are mild — a handful of nights below -5°C, plenty of flying days. Which option gives a small colony the best odds, and what am I not thinking about?
I overwinter a dozen nucs a year in Małopolskie, much colder than North Carolina, so your nuc has good odds either way. My order: the polystyrene nuc box is easiest and most reliable — one small warm cavity and nothing else to heat. Over a strong colony with a double screen board works too, but every visit to the bottom hive disturbs the nuc, and in spring they get confused about their entrance. The full deep is the worst choice: five frames of bees warming a ten-frame box is how nucs die. Whatever you pick: feed 2:1 until it's heavy, entrance to one bee, fondant over the top bars in December.
GeorgiaWes · Sep 26, 2026
Georgia, so even milder than you. I've wintered nucs in plain pine nuc boxes for twenty years with nothing more than a two-inch slab of foam under the lid and a sugar brick. What kills them here isn't cold, it's running out of food on a warm January when they're flying and there's nothing to bring back. Check weight every three weeks. Your mite number is the best part of your post.
TexasBeeSam · Sep 26, 2026
Third option, don't. Texas experience: five frames in a deep with a follower board still has a big cold void above, and I lost two that way before I got smart. Poly nuc or stacked over a strong hive, either. And keep the nuc off the ground — a hive stand or a cinder block, cold ground under a small cluster is brutal.
SourwoodGrace · Sep 26, 2026
Ordered a poly nuc tonight — the double-screen option sounded clever but PasiekaOlek's point about disturbing them on every inspection of the big hive sold me. Feeder's going on tomorrow and I'll heft every few weeks like GeorgiaWes says. Thanks everyone, this is why I keep coming back here.