Beekeeping Calendar

In this period the colony's population sees its fastest growth of the year, and that very speed triggers swarming. Population management in this period is directly swarm management.

Exponential Growth

The queen lays at maximum capacity, the workers born in spring begin foraging, the colony grows by multiplication. This growth is healthy and necessary for the main flow — but uncontrolled, it turns into swarming.

The Biology of the Swarming Instinct

Swarming is the colony's way of reproducing. A single colony divides in two: the old queen flies off with about half the workers to seek a new home (the swarm); the half left behind rears a new queen. This is a success for the colony — one colony becomes two. For the beekeeper it is the loss of half the foraging force and half the potential honey, and just before the main flow.

Swarming Triggers

At the population level, the factors that trigger swarming:

• Overcrowding: when bee density exceeds a certain threshold.
• Brood-chamber congestion: the queen having no place to lay.
• An old queen: as the queen's pheromone weakens the colony inclines to requeen/divide.
• An excess of young idle bees: if there is no brood to tend or comb to draw, young bees turn to swarming.
• Poor ventilation and heat: when the in-hive comfort breaks down.

Controlled Splitting: Turning the Energy

The swarming energy cannot be suppressed but it can be redirected. The beekeeper turns the colony's urge to divide to their own advantage with an artificial split: creating a new colony in a controlled way, both preventing the swarm and increasing colony numbers. This is the smartest use of the swarming energy.

• Split with a brood frame: capped brood + bees are taken into a new hive, and a queen is given or raised from a cell.
• Split with the queen: the old queen is taken into the new split, and the parent colony rears a new queen from a cell.

The Young-Queen Advantage

Colonies with young queens swarm less — a young queen secretes strong pheromone and holds the colony together. So regular requeening is the long-term solution to swarm management.

This is the year's most frequent and most time-critical inspection period. The swarm clock runs fast; a late inspection means a swarm has flown.

Frequency: Do Not Exceed 7 Days

The swarm cycle is mercilessly fast: about 8 days from egg laid in a queen cell to the first cell being capped, 1-2 days from capping to the swarm flying. So a colony that looks clean at one inspection may have swarmed 9 days later. This is why in this period inspection is done every 7 days, without fail. This is the strictest inspection schedule of the whole year.

Timing and Conditions

In mild, sunny, calm weather — the midday hours when foragers are out. The colony is crowded and tense in this period; inspection in poor conditions both irritates the colony and causes misreading.

What Is Sought in Inspection: Queen Cells

In this period the number-one aim of inspection is to search for queen cells. And the search must be thorough — frames one by one, including the lower edges and gaps. A single missed cell means a swarm. Cells are most often hidden along the lower edges of frames and in the empty parts of the comb.

Distinguishing the Cell Type

Not every cell seen is a swarm cell; the type of intervention depends on it:

• Swarm cell: many, along the lower edge of the frame → the colony wants to divide. Space/split intervention is needed.
• Supersedure cell: few, in the middle of the frame → the colony is replacing an old/weak queen. Destroying these cells can leave the colony queenless.

Other Inspection Points

• Brood-chamber congestion: has the laying area narrowed with honey/pollen?
• Crowding: is the hive full, is space needed?
• Queen: is there one, is she laying?
• Comb drawing: is the colony still secreting wax (can foundation be given)?

The Result of Inspection: A Decision

In this period every inspection must end in a decision: give space, split, or (if a supersedure cell) leave. An indecisive inspection — "I saw it but did nothing" — is the most common cause of swarming. If a cell is seen, intervention is made at that inspection; it is not postponed to the next.

In this period feeding is done carefully and with purpose. Wrong feeding triggers swarming; right feeding prepares a weak colony for the flow.

Strong Colony: Not Fed

A crowded, developed colony under swarming pressure is not fed. Giving this colony syrup congests an already full brood chamber further and speeds swarming. What is done for a strong colony in this period is to give space, not sugar.

Weak Colony: Targeted Feeding

A colony that came out of winter weak and is not yet ready for the flow can be fed — the aim is to bring it up to the main flow. Here stimulative feeding is used: a small amount of dilute (1:1) syrup encourages the queen to lay. The aim is not to build stores but to speed development.

The Subtlety of Stimulative Feeding

Stimulative feeding (1:1 syrup) sets the colony in motion with the signal "the flow has begun, grow", imitating a natural nectar flow. But beware: this technique triggers swarming in a strong colony and is used only in a colony that has fallen behind. The distinction is clear: yes to wake a weak one, never to push a strong one.

Pollen / Protein

In spring pollen is generally abundant, but scarcity can occur early or in bad weather. Protein is essential for intense brood production; if the pollen band is weak, a protein patty supports development. Still, natural pollen is the priority.

If the Honey Area Is Open, No Feeding Is Needed

In this period, in most regions, the natural source is already increasing. When a super is added and the colony given space, the colony prepares for the main flow on its own source. So the real "feeding" of this period is often not sugar but space and opening the way for the natural source.

In this period the colony is strong, and pests are relatively in the background. But varroa quietly begins to build, and the split/swarm movements of this period offer a hidden opportunity for mite management.

Varroa: The Start of the Build-Up

Intense brood production is the start of the breeding season for varroa. The mite quietly multiplies in this period. Because the colony is crowded the ratio looks low, but the absolute number has begun to rise. This build-up presents its bill months later at the end of the flow.

The Varroa Advantage of Splitting

This is the hidden opportunity of the period: an artificial split or swarm creates a natural brood break. Because there is temporarily no capped brood in a newly created colony or in the swarm, varroa cannot find a place to hide and turns phoretic (on the bee). Treatment without chemicals in this short window (e.g. oxalic acid, in the broodless state) is very effective. Planning this while splitting means both multiplying the colony and lowering varroa.

Monitoring

• A varroa measurement once a month is enough to track the build-up.
• Chemical treatment is generally not done in this period — the flow is approaching, supers will be added, honey must not be contaminated.
• Mechanical methods such as drone-brood removal can be used (varroa prefers drone cells).

Other Subjects

Chalkbrood: Cool, damp spring weather can trigger this fungal disease. A ventilated hive, a strong colony and a good queen are the best protection. Chalky white mummies in front of the hive are the sign.

Robbing: Low in this period — there is a source in nature. But the risk can rise when bad weather cuts the flow; weak splits and new swarms should be protected.

This is the preparation period before the main flow. The source is increasing but has not yet reached its peak. This increase is the fuel that feeds the colony's explosion and the swarming pressure.

The Rising Flow

Spring flowering widens and intensifies in this period. Nectar and pollen increase steadily, growing the colony fast. This is the herald of the main flow — not the explosion yet, but the steep climb towards it.

Typical Sources of This Period

• Fruit trees: Apple, cherry, plum, almond may have finished flowering, or late species may still be running.
• Oilseed rape/canola: A strong spring source in many regions.
• Legumes: Clover, trefoil and the like begin to open.
• Wild spring flowers: Meadow and pasture richness.
• Willow, maple: Early pollen sources, grow the colony.

The Importance of Pollen

In this period pollen is even more critical than nectar, because the colony is producing brood intensively and the raw material of brood-rearing is pollen. Abundant, varied pollen means a strong, healthy generation of workers. The thickness of the pollen band determines the strength with which the colony will enter the main flow.

The Source-Swarming Relationship

The rising source grows the colony, the growing colony inclines to swarm. So the abundance of this period is two-faced: on one hand it prepares strength for the main flow, on the other it creates swarming pressure. The beekeeper chooses between channelling this energy into the main flow (by giving space) or multiplying with a split.

Foreseeing the Main Flow

In this period the beekeeper's job is to foresee when their own region's main flow will explode. Because all swarm management depends on this timing: the aim is to take the colonies into the main flow at full strength, not having swarmed, and with the honey area ready. Knowing the region's flowering calendar is critical in this period.

This is, as a rule, not a harvest period. The main flow has not yet come; the source gathered goes to the colony's growth and its preparation for the main flow. But there is a limited exception in some early sources.

Why No Harvest

The honey building up in this period is the stock the colony will consume until the main flow and build its strength on. Harvesting in this period means taking the colony into the main flow weak — which puts the real big harvest (main-flow honey) at risk. In short, patience in this period returns as gain in the main flow.

Exception: Early Monofloral Flow

In some regions there may be a strong, single-source early flow in this period (e.g. in some regions rape, citrus, or early forest sources). In such a case, so that the honey of that source keeps its monofloral (single-flower) character, it can be harvested as soon as the flow ends. But this is a harvest from the supers, not the brood chamber, and must not disrupt the colony's preparation for the main flow.

The Real Product: The Colony Itself

The real "product" of this period is not honey but the colony itself. The new colonies produced by artificial splitting are the swarming energy turned into product. Obtaining two or three colonies from one — especially for an operation wishing to increase colony numbers — is the most valuable output of this period.

Queen Rearing

This period is also the ideal period for queen rearing. The colonies are strong, drones are abundant, the weather is suitable. Conditions are excellent for rearing queens from breeder colonies (cell grafting, larval transfer). The young queens produced are used in splits and requeening. The queen is one of the most valuable "products" of this period.

Comb / Beeswax

In this period the colony draws comb (secretes wax). Giving foundation gains drawn comb — a valuable stock for the super needs of the coming periods. So another thing "harvested" in this period is drawn comb for the future.

This is the period in which swarm and split equipment must be kept ready. A swarm can erupt at any moment; the unprepared beekeeper misses both the swarm and the opportunity.

Split and Swarm Equipment — Must Be Ready

The number-one equipment rule of this period: a stock of empty hives and frames must be ready and full. When a swarm issues or a split decision is made, there is no time to go looking for equipment.

• Empty hives: ready with their frames, to make artificial splits and to take issued swarms.
• Swarm-catching bag / box / stick: to take a swarm from a branch.
• Drawn and foundation comb: for new splits and expanding colonies.
• Queen cage: to introduce/protect the queen in splits.

Queen-Rearing Equipment

This period is ideal for queen rearing; if rearing is to be done the equipment must be ready:

• Grafting (transfer) tool, cell cups, cell bars.
• Starter/finisher hive arrangement.
• Mating boxes (nuclei): for the young queens to mate and begin laying.

Honey Area Equipment — Preparing for the Main Flow

The main flow is at the door; the super and frame stock must be prepared now. Adding a super in the swarm period both gives the crowd space (prevents swarming) and prepares for the flow. Entering the main flow without enough supers means congesting the colony when the flow comes.

• Empty super boxes and frames: a spare per colony.
• Queen excluders: for the honey area to stay clean.

Inspection Equipment

Because frequent inspection is done in this period, the basic equipment (smoker, veil, hive tool) must always be ready and working. Smoker fuel, a clean veil, a sharp hive tool — these speed and ease the frequent inspection.

Marking Material

Many young queens are reared/issued in this period. Marking the queen with a paint pen allows tracking which queen is from which year and in which colony. A marked queen is quickly found in inspection and her age is known.

In this period the apiary site must support the fast-growing colonies and intense beekeeping activity (inspection, splitting, adding supers) at the same time.

The Need for Space and Spreading Out

The colonies are growing, splits are being made, colony numbers are rising. The apiary space must give room for this expansion. Flat, sound, suitable locations must be prepared in advance for new splits. A cramped apiary both hinders work and raises the risk of drifting and robbing between colonies.

Water

Intense brood production raises the water need — for brood-rearing and hive climate control. The water source must be uninterrupted, near and with a drowning-preventing surface. In this period water directly affects the colony's rate of growth.

Flight Traffic

With the rising population, flight traffic intensifies. Flight paths must be clear in front, and hives positioned so they do not block one another's flight. When new splits are placed, flight directions must be considered — crossed flight paths increase drifting and disease spread.

Hive Location and Sun

In spring a location catching the morning sun is an advantage — the colony warms early, goes out to forage early, works more. But as the period advances the midday heat rises, so a location providing afternoon shade is the ideal balance.

Weeds and Ground

Weeds grow fast in spring. The hive surroundings and the front of the entrance must be kept clear — overgrown weeds block flight, hold damp, shelter rodents. The ground must be sound and level; growing (heavier) hives must stand stable.

Migratory Beekeeping Preparation

If migration is planned to follow the main flow, this is the preparation period: determining the target location, arranging permissions, preparing the migration equipment. If the colonies are to be moved to the main flow, the aim is to move them at full strength, not having swarmed.