The Demaree Method: A Step-by-Step Guide to Vertical Swarm Control
A practical walkthrough of the Demaree method, a vertical hive manipulation that curbs swarming impulse without splitting the colony or sacrificing the honey crop.
What the Demaree Method Actually Does
Named after George Demaree, an American beekeeper who published the technique in the late nineteenth century, this method solves a specific problem: how to relieve the crowding and hormonal cues that trigger swarming without dividing the colony into two weaker units. Unlike a straightforward split, the Demaree method keeps every bee, every frame of brood, and the original queen working under one roof. It simply rearranges where things sit within the stack of boxes so the colony's own biology stops pushing toward reproduction.
The core idea is separation by height. The queen is confined, using a queen excluder, to a box at the very bottom or very top of the stack (bottom is more common in UK practice because it keeps the queen near the entrance and reduces disruption to her laying rhythm). Nearly all of the open and sealed brood is moved above the excluder, physically distant from her. Foragers continue flying from the original entrance, nurse bees redistribute themselves to cover the separated brood, and the queen is left with empty, drawn comb to fill with fresh eggs. This breaks the visual and pheromonal signal of a broodnest crammed solid with bees and brood, which is one of the principal triggers for queen cell construction.
Setting Up the Manipulation
The setup happens in a single, fairly involved inspection, ideally performed just as a colony is showing early signs of congestion but before any queen cells have been started. Find the queen and place her, on her frame, into a fresh brood box positioned at the bottom of the stack. Fill the remainder of that box with drawn comb or foundation, giving her ample room to lay without delay. A queen excluder goes directly above this box.
Above the excluder sits a second brood box holding essentially all of the original brood frames, at all stages, along with the bees covering them. If the colony is strong enough, a queen excluder-topped honey super or two can be added above that for the current nectar flow. The net effect is a queen with fresh laying space at the bottom, a solid wall of sealed and hatching brood in the middle reinforcing forager recruitment, and supers on top collecting the crop those extra bees will produce as they emerge.
Managing the Colony Through the Cycle
The manipulation is not a one-off fix; it requires disciplined follow-through. Every seven to ten days, the upper brood box must be checked and any queen cells started on those frames destroyed. Because the queen is excluded from that box, any cells found there are unambiguously supersedure or swarm cells rather than normal replacement cells tied to her presence, so they can be removed without hesitation. Skipping this step defeats the entire manipulation, since bees separated from the queen by an excluder will still attempt to raise a new one from the brood they are nursing if the urge to swarm persists.
As the lower box's brood matures and the upper box's brood emerges, the roles of the two boxes gradually reverse: the queen's chamber fills with hatching brood again and the top box empties into drawn comb. Many beekeepers repeat the whole rearrangement, reversing boxes and clearing new cells, every ten to fourteen days through the peak swarming season, effectively resetting the clock each time congestion starts to rebuild.
When Demaree Works Well and When It Doesn't
This method rewards colonies that are already strong and well provisioned, since it depends on a large population of nurse and forager bees to service two separated brood areas simultaneously. Weak or resource-poor colonies are poor candidates; the manipulation can overextend them rather than calm them. Timing matters just as much as colony strength. Applied at the first sign of overcrowding, before any queen cells are started, the method reliably interrupts the swarming sequence. Applied after cells are already capped, it is usually too late, and a beekeeper is better off performing an artificial swarm or a straightforward split instead.
The trade-off against splitting is instructive. A split creates two smaller, independent units and typically costs a season of maximum honey yield while both halves rebuild. Demaree keeps the full field force under one queen and one entrance, so the colony can continue provisioning supers through the manipulation, which is why many beekeepers favour it specifically during a strong spring nectar flow when they want swarm control without giving up the crop.
Practical Pitfalls Worth Planning For
Weather and timing errors are the most common causes of a failed Demaree. Performing the initial rearrangement in cool, wet, or windy conditions stresses the colony and can chill brood left temporarily exposed during the sort. Bees also need a settled few days afterward to reorganise themselves around the new arrangement, so squeezing the manipulation in just before a spell of poor weather undermines it.
Ventilation deserves attention too. Stacking multiple boxes plus supers increases the hive's overall height and can concentrate heat and moisture if entrances and any upper ventilation points are not managed properly, particularly in a heatwave. Finally, keep meticulous track of which box currently holds the queen, especially if reversing boxes repeatedly through the season; a moment's confusion during a busy inspection is how queens end up accidentally excluded from where they are needed, or crushed during a hurried box swap.
Frequently Asked Questions
How is the Demaree method different from an artificial swarm?
An artificial swarm splits the colony into two physically separate hives, mimicking a natural swarm event and creating two smaller units. The Demaree method keeps everything in one stack under one queen, using an excluder to separate brood by height rather than dividing the bees into two boxes on two stands.
Do I need a queen excluder to perform this technique?
Yes, a queen excluder is essential. It confines the queen to her designated box so she cannot follow the brood upward, which is what makes the separation-based swarm suppression work and lets you clear queen cells from the upper box with certainty that they are not tied to her presence.
How often should I repeat the manipulation once started?
Most beekeepers recheck and clear queen cells every seven to ten days, and many fully reverse the box positions every ten to fourteen days through the height of swarming season, since congestion tends to rebuild on roughly that cycle.
Can this method be used on a first-year colony?
It is rarely necessary or wise for a first-year colony, since young colonies are usually still building population and comb and are unlikely to reach the crowding threshold that triggers swarming. Demaree is best reserved for established, populous colonies in their second season or later.