Beekeeping Calendar

In this period the colony population shifts into explosive mode. The winter bees have fully given way to spring bees, and the queen approaches full capacity. This rapid growth lays the foundation for the season and, if not managed correctly, triggers swarming.

Exponential Growth Continues

The queen brings her laying tempo close to its peak, the bees born in spring begin nursing and foraging, and the colony grows exponentially. Each worker born allows more brood to be tended, which means faster growth — a positive loop. This exponential growth is the only way to enter the main flow strong.

The Generational Change Completes

In this period the last winter bees that overwintered die, and the colony comes to consist entirely of spring bees. When this transition completes, the colony becomes "young" and dynamic — spring bees are energetic, healthy, and hard-working. A colony that completes its generational change in good health strengthens rapidly.

First Signs of Swarm Pressure

Strong, fast-growing colonies may begin to show swarm pressure toward the end of this period (especially in a warm, early spring). Early swarm cells and brood-nest congestion are watched for. Although the swarm season has not yet arrived, strong colonies can start it early; it is prevented by giving room.

Equalizing Colonies

Colonies in the apiary develop at different rates. Taking a frame of capped brood from strong colonies and giving it to weak ones (equalizing) both strengthens the weak colony and reduces the strong one's swarm pressure. This technique is the way to bring the apiary into the main flow balanced and strong. But to avoid carrying disease, frames are taken only from healthy colonies.

The (Advancing) Emergence of Drones

In this period drone production becomes prominent — the colony prepares for the reproductive season. The emergence of drones is also needed for queen rearing and mating. This is a healthy, seasonal development.

Evaluating the Queen

This period is when the queen's quality becomes clear. A good queen builds a broad, capped, regular brood nest and grows the colony rapidly. A poor queen (old, poorly mated, diseased) produces scattered, small, rough brood and slow build-up. If a poor queen is detected in this period, her replacement (requeening) is planned — because a poor queen means a poor main flow.

In this period inspection becomes regular and thorough. The weather allows the hive to be opened; because the colony changes rapidly, regular monitoring is essential.

Frequency and Timing

A thorough inspection every 7-10 days is appropriate; it grows more frequent as the colony accelerates and the swarm season approaches. Inspection is done in the warm, sunny part of the day (around midday). In regions with late-frost risk, inspection is postponed on suddenly cold days — open brood must not be chilled.

What Is Inspected

• Queen and laying: the order of the brood nest, growth rate, queen quality.
• Build-up: how much has the colony strengthened, is room needed?
• Stores: has the spring-starvation risk passed, is there enough honey/polen?
• Disease: brood pattern, nosema traces, varroa status.
• Swarm precursors: early swarm cells, brood-nest congestion.

Reading the Brood Nest: The Mirror of Health

In this period the brood nest is the best indicator of colony health. Healthy: capped, regular, uniform, a broad area — "like a blanket" of flat cappings. Problematic: scattered, rough (a "pepperbox" look), sunken or perforated. A problematic brood nest is a sign of varroa, foulbrood, a poor queen, or a nutrition problem and must be investigated at once.

Evaluating the Queen

The queen's performance is clearly visible in this period and becomes the basis for future decisions: a good queen is preserved and becomes a breeding candidate; a poor queen is planned for replacement. Requeening can be done in this period or in the later build-up — doing it early brings the colony into the main flow with a good queen.

Inspection Discipline

Inspection must be quick but complete. The hive should not stay open long (open brood chills, the colony chills). Each frame must be lifted carefully — spring comb is not heavy, but the queen can be crushed in the bustle. After inspection everything must be replaced in the correct order; the brood nest must not be split.

In this period targeted feeding is done to accelerate build-up and prevent late starvation. The natural source rises, but the energy demand of the spring explosion is high; balance matters.

Natural Source or Feeding

In this period natural nectar and polen begin to rise in most regions. A strong, well-stocked colony can now build up on its own source and may not need feeding. But targeted feeding may continue to accelerate build-up or support colonies that are behind.

Stimulative Feeding: Accelerating Build-up

Stimulative feeding (1:1 thin syrup) mimics a natural nectar flow, prompts the queen to lay more, and speeds the colony's growth. This is the tool of the beekeeper who wants to enter the main flow stronger. Especially in regions where the main flow comes early, it is used to bring the colony to its peak in time.

The Risk of Stimulative Feeding: Swarming

Caution: in strong colonies stimulative feeding can trigger early swarming. Giving extra stimulus to an already fast-growing colony can push it into swarming through congestion. So stimulative feeding is used selectively: yes to accelerate a colony that is behind, no to push a colony that is already exploding.

Polen / Protein

Intense brood production demands much protein. In this period natural polen usually rises (fruit trees, dandelion), but in an early or bad-weather stretch there can be a shortage. If the polen band is weak and build-up is protein-limited, a protein patty can be given. Natural polen is always the priority.

Ending Feeding

When the main flow approaches, feeding is stopped. There must be no syrup in the hive when entering the main flow — otherwise the syrup mixes into the honey to be harvested (adulteration). For this reason stimulative feeding is ended well before the main flow.

Water

Intense brood and increased foraging raise the water requirement. A nearby, sunny water source with a drowning-preventing surface supports the colony's build-up. In this period water is a tool needed far more often than feeding.

In this period, as the colony strengthens, varroa begins to breed again and brood diseases can appear. Monitoring the healthy brood nest is the most important health task of the period.

Varroa: Breeding Resumes

As brood production increases, varroa re-establishes its breeding cycle. In this period the mite count may still be low (if treated during the brood break), but it begins to rise. Monitoring is important:

• A monthly varroa count to track the rise.
• Chemical treatment: in this period it can be done before the main flow and before supers are placed. Once the main flow begins and supers are on, treatment becomes difficult (honey must not be contaminated). So spring can be a treatment window, if needed.
• Drone comb removal: because varroa prefers drone cells, cutting out drone brood is a mechanical reduction method.

Brood Diseases

Spring is the period when brood diseases can appear; they are detected early by monitoring the healthy brood nest:

• Chalkbrood: a fungal disease in cool, damp weather. Chalk-white mummies at the hive front. A ventilated hive, strong colony, and good queen are the best protection.
• Foulbrood (American/European): a serious bacterial disease. Scattered brood, sunken/perforated cappings, foul smell, the ropiness test. On suspicion of American foulbrood, consult a specialist/veterinarian at once — it is highly contagious and destructive and may require legal notification.

Nosema

In early spring nosema can still be a risk, especially in colonies that emerged weak. Fecal staining, crawling bees, and failure to build up are watched for. The chance of a cleansing flight (sun), a dry hive, and a strong colony are the best prevention.

Robbing

In early spring, because the natural source is not yet fully abundant, robbing can be a risk on bad-weather days — especially in weak colonies and if feeding is being done. Entrances are narrowed to strength, and feeding is done in the evening and closed.

The Principle of Early Detection

The health philosophy of this period is early detection. While the colony grows rapidly, a disease also spreads rapidly. Regular, careful brood-nest inspection catches a problem while it is still small. A disease caught in early spring can be treated; the same disease, if it erupts in the main flow, ends the season.

In this period nature truly becomes generous. The first major blooms feed the colony and grow it rapidly — the first true abundance before the main flow.

The First Real Flow

The transition from maintenance level to real income happens in this period. The first serious nectar and polen sources open; the colony no longer merely survives but grows and begins to store. The hive scale can turn from falling to rising. This is the moment the season gains momentum.

The Main Sources of This Period

• Fruit trees: apple, pear, cherry, plum, apricot — strong in orchard and fruit-growing regions, both nectar and abundant polen. The bee also pollinates these trees (mutual benefit).
• Dandelion: the classic abundant source of early spring; both nectar and polen, growing the colony rapidly.
• Oilseed rape/canola (early): in some regions a strong spring flow begins.
• Spring wildflowers: various wild species.
• Maple, oak (polen): tree polen feeds the colony.
• Willow (still): in early regions it still gives polen.

The Decisive Role of Polen

In this period polen directly determines the colony's growth rate. Abundant, varied polen = rapid brood production = a strong main-flow colony. Polen-rich sources such as fruit trees and dandelion are for this reason the engine of spring build-up. A thickening polen band is a sign that the colony is preparing strongly for the main flow.

Early Monofloral Opportunity

In some regions there is a strong, single-source early flow in this period (for example canola, citrus, in some regions the first forest sources). This can be an early monofloral honey opportunity — as long as it does not disrupt the colony's build-up. Usually this early source is directed to colony build-up rather than harvest.

Late-Frost Risk

The source of this period is fragile against late frost. A late frost can strike blossoming fruit trees and abruptly cut the flow — a loss for both bee and grower. While relying on the source, the beekeeper must keep this risk in mind and not let the colony exhaust its internal stores entirely.

This is as a rule not a main harvest period; the source gathered goes to the colony's build-up and preparation for the main flow. But there is limited harvest from some early sources and, more importantly, "product" in the form of colony increase.

Why No Main Harvest

The honey gathered in this period is the fuel the colony needs to grow until the main flow. An early harvest sends the colony weak into the main flow and jeopardizes the real big harvest (the main-flow honey). Patience in this period returns as gain in the main flow. The rule: in this period the colony is built, not harvested.

The Limited Early-Harvest Exception

If there is a strong, early monofloral flow (for example canola — which must be taken in time because it crystallizes quickly) and the colony is strong enough, a limited harvest can be taken from the supers. Canola honey requires special care: it crystallizes rapidly in the comb and becomes impossible to extract, so timely harvest is critical. Even so, the brood nest is not touched.

The Real Product: Colony Increase

The most valuable output of this period is not honey but new colonies. Strong colonies are increased through artificial splits (swarm control). A spring split means a new colony that will develop through the season and become a production colony next year. For an operation wishing to increase colony numbers, this period is the start of increase.

The Start of Queen Rearing

Toward the end of this period, when colonies have strengthened and drones have appeared, queen rearing can begin. Producing queens from breeder colonies (grafting larvae, cell management) provides young queens for splits and requeening. The queen is one of the most valuable products of this period.

Comb Building

In this period colonies secrete wax and draw comb. Giving foundation provides drawn comb — a valuable store for the super needs of the main flow. A strong, developing colony is very productive at drawing comb; this opportunity is used.

In this period equipment is used intensively for spring expansion and colony increase. Colonies grow rapidly and are split; equipment must be ready and sufficient.

Expansion Equipment — Must Be Sufficient

Growing colonies want room; the equipment to give room must be ready:

• Drawn comb and foundation: to be added as the colony expands. Drawn comb prevents the colony from losing time drawing.
• Extra box / super: to give room when the brood nest fills.
• Queen excluders: ready for the super arrangement.

Split and Increase Equipment

Colony increase begins in this period; equipment must be ready:

• Empty hives and nucleus boxes: for spring splits.
• Queen cages: to give queens to splits.
• Queen-rearing equipment: grafting needle, cell cups, mating boxes.

Inspection Equipment — Intensive Use

Regular inspections have begun; basic equipment must be constantly ready: smoker (enough fuel), clean veil, sound hive tool, queen marking pen. In frequent inspection, good equipment speeds the work and stresses the colony less.

Removing Winter Equipment

Winter arrangements are removed gradually: the mouse guard comes off, the entrance is opened, insulation is loosened. Removed winter equipment is cleaned, dried, and stored for next winter. But nothing is removed all at once until the risk of late frost has passed.

Feeding Equipment

If stimulative feeding is being done, internal feeders must be clean and leak-proof; protein patty ready. Because feeding will be stopped as the main flow approaches, feeding equipment is prepared to be cleaned and stored.

The Scale

In this period the scale is valuable both for seeing that the source has begun (the rise) and for monitoring build-up. A reference hive scale shows the apiary's spring momentum and tells when to add room/supers.

In this period the apiary is prepared for full operation. Winter protections are removed, the growing colonies and increasing work are arranged for, but precautions against late frost are maintained.

Gradual Removal of Winter Protection

When the weather warms permanently, winter arrangements are removed gradually: windbreaks are loosened, excess insulation is taken off, hives are placed in full sun / a suitable position. But gradual is the key word — if a late frost comes, an unprotected, developing colony is struck. If hard cold is expected, protection is maintained.

Establishing the Water Source

Intense brood and foraging raise the water requirement. The water source is fully established: nearby (100-200 m), sunny, with a drowning-preventing surface, uninterrupted. A good water source keeps the bee away from neighbours' (unwanted) sources and supports build-up.

Room and Expansion Layout

Colonies grow, splits will be made; the apiary space is prepared for this expansion. Flat, firm sites are prepared for new splits. The spacing between hives and flight directions must account for increased traffic and new colonies — a cramped layout increases drifting and robbing.

Sun and Heat Balance

In early spring a position that catches the morning sun is an advantage — the colony warms early and goes out to forage early. As the period advances and midday heat rises, a position offering midday shade (but catching the morning sun) is the ideal balance.

Site Cleanup

Spring weeds grow rapidly. The area around the hive and in front of the entrance is kept clear — overgrown weeds obstruct flight and hold moisture. Winter damage (broken branches, shifted materials) is cleared. The ground is levelled and drainage is checked.

Preparing for Migratory Beekeeping

If migration is planned to follow the main flow, the target location and timing are arranged in this period. Migration to early sources (for example canola) can occur in this period. Migration conditions (night/early morning, ventilation) are always observed.