Spring Colony Inspection Checklist

When to inspect

The first full spring inspection should happen when outdoor temperatures are reliably above 12–14 °C during the middle of the day, with no wind and ideally sunshine. In southern Ontario and the Lower Mainland of British Columbia, this is typically late April. In Quebec's St. Lawrence corridor and southern Alberta, early to mid-May is more common. In northern provinces, conditions may not permit a full inspection until late May.

An inspection in cold conditions stresses the colony and can chill open brood. If the colony is showing normal entrance activity — bees making cleansing flights, pollen being carried in — it is a reasonable sign that conditions inside the hive are adequate and that a few extra days of patience will not cause harm.

Equipment for the spring inspection

• Lit smoker with cool white smoke (damp wood chips or burlap). A few puffs at the entrance and under the inner cover settle bees before the boxes are separated.
• Hive tool for breaking propolis seals and prying frames apart.
• Protective gear appropriate to your comfort level — at minimum a veil. Spring bees are generally calmer than summer bees but can be defensive in cold or overcast conditions.
• A notepad or phone for recording observations. Spring inspection notes are the baseline against which the rest of the season is measured.

Inspection checklist

1. Colony strength

Before looking at brood or the queen, estimate how many frames of bees are present. A frame of bees is one side of a frame covered with bees — approximately 2,000–2,500 workers. A colony entering May with fewer than 4–5 frames of bees will struggle to expand quickly enough to take advantage of the main nectar flows. Such a colony may need to be united with another weak colony or given a frame of sealed brood from a stronger hive.

2. Food stores

Check remaining honey frames. A colony that has consumed most of its stores and is now building up rapidly can run out of food before the dandelion flow begins. Spring starvation in late April or early May — when a large and expanding colony is consuming food faster than foragers can gather it — is a recognised risk in years with a late spring or cold April.

Feeding 1:1 sugar syrup (by weight) stimulates brood production and compensates for low stores. Some beekeepers also provide pollen substitute patties in early spring to accelerate brood rearing before natural pollen is abundant. This is particularly common in prairie provinces where the forage season is compressed.

3. Brood pattern

A healthy brood pattern is compact, mostly capped, and consistent: cells are capped with smooth, slightly convex caps in a solid arc with few uncapped cells scattered through the brood area. The pattern is often described as a "solid" or "tight" brood pattern.

An irregular or "shotgun" pattern — capped cells scattered with many empty cells between them — indicates problems. The causes include:

• A failing or poorly-mated queen.
• Sacbrood virus, which causes larvae to die after capping, creating scattered sunken or perforated caps.
• High Varroa load, which affects brood development and immunity.
• Chalkbrood, identified by hard white or grey pellets in cells — a chalk-white mummified larva.

4. Queen assessment

Finding the queen directly is not necessary at every inspection. Evidence of a healthy laying queen includes the presence of eggs (small white grains standing upright in cells — visible with good light or magnification), young larvae in various stages of development, and a compact brood pattern as described above.

A colony without eggs but with capped brood may have a queen that has recently stopped laying. A colony with no eggs and no young larvae, only older capped brood, is likely queenless. A colony with multiple eggs per cell and irregular brood in a scattered pattern across all frames, including honey frames, typically has laying workers — a condition that develops when a colony has been queenless for several weeks and certain workers begin laying unfertilised eggs.

5. Space assessment

A colony that has come through winter on two deeps with the cluster at the top of the upper deep may have the brood nest pinched between stores on either side. If the outer frames of the upper box are still capped with honey and the brood area is tightly compressed into 4–5 central frames, the colony will benefit from having some honey frames removed or rearranged to give the queen room to expand her laying. This is sometimes called "spring checkerboarding."

Adding a honey super before the May build-up is complete is generally premature unless the colony is already extremely strong (8+ frames of bees, both deeps nearly full). Adding space too early in cold weather slows colony development by forcing bees to heat a larger volume of air.

6. Disease and pest indicators beyond brood

While examining frames, check for:

• Nosema symptoms: dysentery streaks (brown staining) on the front face of the hive or on the bottom board. Nosema is a microsporidian gut pathogen that weakens foragers, particularly after long winters with extended confinement.
• Small Hive Beetles (SHB): adults are small dark brown beetles. SHB is present in Ontario and British Columbia. In spring, numbers are low, but traps should be in place before warm weather arrives.
• Wax moth damage: wax moth larvae overwinter in hive debris and abandoned comb. Tunnels through old comb covered in webbing and frass (droppings) indicate wax moth activity, which typically indicates the colony was too weak to defend its comb.

Recording and follow-up

A brief written record at each inspection is more useful than it may seem at the time. Recording the number of frames of bees, a score for brood pattern (1–5), whether the queen was seen, stores status, and any unusual observations creates a baseline that makes it possible to compare hive status across weeks and across years.

Many Canadian provincial apiary offices provide inspection record templates. The Ontario Apiarists' Association maintains publicly available resources for registered beekeepers, and provincial apiarists can be contacted directly when disease signs are unclear.

Sources