How to Split a Bee Hive and When to Do It

What a hive split is and why beekeepers do it

A split divides one established colony into two or more. The usual goals are to make more colonies, to ease crowding so the bees are less inclined to swarm, or to replace losses from winter. A split mimics what bees do naturally when they swarm, except that you control the outcome and keep the bees in your apiary.

A split is not free. The parent colony loses bees and brood, so it will produce less surplus honey that season. Many beekeepers accept that trade because a split colony that stays home is better than a swarm that leaves. If you are weighing it against prevention alone, see swarm cells for the signs that a colony is already preparing to leave.

When to split a hive

Timing depends heavily on your climate and local nectar flow, so treat any dates as rough. In many temperate regions splits are made in spring or early summer, after colonies have built up strongly and there are plenty of young bees and drones available, and while there is still enough of the season left for the new colony to grow before winter. Many guides cite late March to May for the northern hemisphere, but a cold spring or a late flow can move that window by weeks.

A few practical conditions matter more than the calendar:

• Daytime weather is reliably warm enough for bees to fly and for a new queen to mate.
• The colony has filled most of its space with bees and brood.
• Forage is available, or you can feed.
• There is time for the new colony to build up before winter.

Late-season splits are riskier in cold regions. By October in many northern areas, bees are shrinking the brood nest and forming a winter cluster, drones are being evicted, and a small new colony may not reach a safe size or stored food level. If you are considering a split that late, talk to a local mentor or club first.

Signs a colony is ready to split

No single sign is conclusive, but several together suggest a colony could be split:

• Many frames covered with bees and several frames of brood in different stages.
• Boxes that are nearly full of bees, brood, and stored nectar.
• Drone brood present, which usually means the colony is in reproductive mode.
• Queen cups or queen cells. Cups that are empty are common; cells containing a larva or egg deserve attention.
• Heavy crowding at the entrance. Evening bearding can reflect heat and crowding, but it does not prove swarming is near.

If you find capped queen cells, a swarm may be imminent or may have already left, and you may need to act quickly. Our guide to swarm cells explains how to read what you see.

Before you start: equipment and planning

You will need a second hive body or box (a nucleus box works for a smaller split), frames with foundation or drawn comb, a hive tool, a smoker, and protective gear. Decide in advance where the new hive will stand, and have sugar syrup available in case the split needs feeding.

Most beekeepers aim to give each half some brood, some food, and enough bees to cover the brood. A split that is too small may struggle to keep brood warm. A common approach uses several frames of brood plus adhering bees and one or two frames of stores, but exact numbers vary with the season and the beekeeper, so treat them as guidance.

Method 1: Walk-away split

In a walk-away split, you move frames to a new box and let the queenless half raise its own queen. It requires no purchased queen, which is its main appeal.

1. Find the queen in the original hive, and put her in a safe place such as back in the original box with a frame of her choosing. Locating her first avoids moving her by accident.
2. Choose frames of brood with eggs and young larvae from the original box, with the bees on them. Include a frame or two of honey and pollen.
3. Place these frames in the center of the new box. Fill the remaining space with empty frames or drawn comb.
4. Be sure there are plenty of young nurse bees on the moved frames. Foragers tend to return to the original location, so a split may need extra young bees.
5. Close the box with a reduced entrance.

Without a queen, bees in the new box can build emergency queen cells from young larvae (see raising queen bees for the timeline). It takes time: a queen needs roughly two weeks from egg to emergence, and then days more to mate and begin laying, so the new colony may be without laying for around a month. Hold off on disturbing it while that process runs. The risks of this method are that the new queen may fail to mate or may not be raised at all, so some beekeepers keep a spare frame of eggs ready to add from the parent colony.

Method 2: Split with a purchased or mated queen

Here you add a mated queen to the queenless split, which shortens the queenless period. A purchased queen is normally caged and introduced slowly, with the colony allowed to accept her through the cage before release.

1. Make the split as in Method 1, leaving the original queen in the parent hive.
2. Place the new queen cage in the split. Follow the supplier’s instructions on introduction timing.
3. Check for emergency queen cells after a few days and remove them if you are introducing a queen, because bees that are building their own queen may reject a new one.
4. Check later that the queen has been released and is laying.

This approach costs more but is more predictable, and it can improve genetics if you buy a good queen.

Method 3: Splitting when queen cells are present

When a colony has swarm cells, some beekeepers use them to their advantage. They move the queen and some frames of brood and bees to a new box, leaving the capped queen cells and most of the bees in the original location. This is sometimes called an artificial swarm. The queen continues laying in the new box while the original colony raises a new queen from the cells. It can interrupt the swarming impulse, though it does not always do so, and details vary between guides. Beginners may want to follow a mentor the first time.

Where to place the new hive

If you move a split a short distance within the same apiary, foragers may return to the old spot. A commonly repeated rule of thumb is to move a hive either only a very short distance (under about three feet) or more than about three miles so foragers do not fly back; these figures are approximate, not exact. Others keep the split in the same yard and compensate by adding nurse bees. Either way, a reduced entrance (entrance reducers) helps the smaller colony defend itself from robbing. The signs of robbing are listed in reading bee behavior at the hive entrance.

Checking on the split afterward

Leave the split alone for the first several days while the bees settle. After that, inspect lightly. In a queenless split, look for queen cells within a week or so. After a couple of weeks, look for a virgin queen or signs she has emerged. Look for eggs a few weeks later as evidence she mated and has begun laying (how to tell if a queen has mated). If you find no eggs after a reasonable time, you could add a frame of eggs from another colony or combine the split back with a stronger one. If you also want to help the split grow, see how to increase the bee population in a hive.

Common problems

• The split never raises a queen. This can happen if no young larvae were included or the bees were too few. Adding a frame of eggs or combining may rescue it.
• Robbing. Small colonies are vulnerable, especially in a dearth. Reduce the entrance.
• Starvation or chill in the new box. Provide stores and keep enough bees to cover brood.
• The parent colony swarms anyway. A split lowers the likelihood but does not eliminate it. Keep watching for queen cells.

FAQ

When can I split my bee hive? Usually in spring or early summer, when the colony is strong, the weather is warm, and there is time for the new colony to grow before winter. Local climate changes the dates.

What are the three types of beehives? Common types are Langstroth, top-bar, and Warré hives, though other designs exist. Splitting is simplest in a movable-frame hive such as a Langstroth; see types of bee hives compared.

What is a bee’s worst enemy? The varroa mite is widely regarded as the most serious threat to honey bee colonies, along with diseases it spreads. A strong split still needs mite monitoring.

What happens to bees in October? In many northern climates colonies reduce brood rearing, stop drones, and cluster as temperatures drop. This is why splitting then is generally discouraged.