Spring Buildup: What to Do in March and April
Spring buildup is the most critical period of the beekeeping year in Northern Kentucky. The colony that exits winter as a small cluster must nearly triple in population before the tulip poplar flow peaks in late May — and every week of delay costs honey.
Here's how we approach March and April.
First inspection — wait for 50°F
Don't open hives on cold days. Brood chilling kills larvae and sets colonies back weeks. Wait for a calm afternoon above 50°F, ideally 55°F or warmer. Your first look of the year just needs to answer three questions:
- Is the queen alive and laying?
- How much honey remains?
- Is there enough space for the expanding cluster?
If the answer to #2 is "not much," feed immediately — 1:1 sugar syrup stimulates brood rearing and prevents starvation in the hungry gap before blooms open.
Watch the redbud
Redbud is our phenological trigger. When the roadsides go pink — typically the first week of April in ZIP 41018 — it means the colony has been rearing brood for 3–4 weeks and is about to accelerate rapidly. This is when we:
- Add a second brood box if the first is 80% full
- Verify the queen has room to lay — a queen with no open cells will slow down or swarm
- Check drawn comb in storage and start warming it for expansion
Swarm prevention starts now
Swarming is a natural impulse strongest in April and May. A colony that swarms before the tulip poplar flow loses half its bees and typically makes no surplus honey that year. Prevention beats intervention:
- Keep the broodnest open with empty drawn comb
- Reverse boxes if the cluster has moved to the top box over winter
- Check for queen cells weekly from mid-April onward
- Consider a split on any colony that shows signs of swarm preparation
Native plants that help
The bloom calendar tells the story clearly: March and April have fewer forage plants than any other time of year. Every native plant that blooms early matters.
- Serviceberry — late March, first woody bloom of spring
- Redbud — early April, critical nectar and pollen
- Virginia Bluebells — mid March through April, early pollen
- Bloodroot — mid March, brief but early pollen source
If you have space, planting any of these on your property directly benefits your hives during the most nutritionally stressful period of the year.