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From the founders
We're in the thick of it. Swarm season is happening right now — colonies are at peak spring buildup, populations are exploding, and if your bees have outgrown their space, they may already be making plans to leave.
If you've already lost a swarm this spring, this post will help you understand what happened and prevent it from happening again. If yours are still intact, there's still time to act — but not much.
This week's blog is a deep dive into why colonies swarm, how to read the signs, and what your hive design has to do with it. Dr. Jason Graham, our Head of US Operations, walked us through the biology on one of our calls - the difference between swarm cells and emergency queen cells, what the duds mean, and why space management is really the beekeeper's main job.
— The Primal Bee Team
Why your bees are leaving (and how to make them stay)
Not all queen cells mean the same thing. Cells hanging off the bottom of the frame signal a strong colony preparing to reproduce — it needs space or a split. Cells in the middle of the comb signal a queen problem — workers trying to replace a weak or absent queen. Random empty cells with no eggs? Just bees building wax. No action needed.
The real swarm prevention question isn't "are there queen cells?" It's "does this colony have enough room to grow?"
In a standard double-deep Langstroth, swarming pressure starts at 5-9 frames of brood. That's a low threshold for a colony that wants to expand. The Primal Bee nest chamber gives the queen the equivalent of 14-16 standard frames of continuous laying surface on just 8 frames — and you only need to check 8 frames for swarm cells instead of 24.
Dr. Graham's inspection advice: if you haven't done a full inspection yet, most regions are well past the threshold by now — get in there. Look for fresh eggs and a continuous spiral brood pattern (that means the queen is healthy). Manage space gradually — always slightly ahead of growth, never massively ahead of it. And if your colony is strong enough to swarm, it's strong enough to split. Move 2-3 frames with fresh eggs into a second box and you've turned a potential loss into two productive colonies.
🪦 At Cave Hill, bees are part of preservation, not just pollination.
🐝 Bees are still dying - just without the media buzz.
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Until next time
The bees have been reproducing this way for millions of years. They're not going to stop because we'd prefer they didn't. What we can do is give them enough room to grow, read the signs when they're getting ready to leave, and channel their reproductive drive into managed splits instead of uncontrolled swarms.
Your hive should be working with bee biology, not against it. That's true in every season, but it matters most right now.
Happy beekeeping,
The Primal Bee Team 🐝