Seasonal Management
What to Do During a Nectar Dearth (And How to Know One Is Coming)
By Scout Theory · May 2026 · 9 min read
A nectar dearth is a period when little or no nectar is available to foraging bees. It is the hidden season that catches beginners off guard every year. One week your hive is booming, bees are bringing in nectar by the pound, and supers are filling fast. The next week, everything stops — and your colony shifts into survival mode.
Dearths are not emergencies. They are normal, predictable parts of the beekeeping calendar. The problem is that most beginners do not know they are coming and do not recognize the signs until the colony is stressed, defensive, and possibly robbing weaker hives.
When Dearths Happen
Most regions experience at least one dearth per year. The most common pattern:
| Region | Typical Dearth Period | Between These Flows |
|---|---|---|
| Southeast | Late June–August | Spring clover → fall goldenrod |
| Mid-Atlantic | July–mid-August | Tulip poplar → goldenrod |
| Midwest | Mid-July–August | Clover → goldenrod/aster |
| Southwest | June–monsoon season | Spring bloom → summer rains |
| Pacific NW | Late July–September | Blackberry → fall ivy |
How to Recognize a Dearth
Your bees will tell you before any calendar can. Here are the signs:
Increased aggression. Bees that were gentle last week suddenly bump your veil, follow you after inspections, and sting at minor provocations. During a flow, bees are too busy to care about you. During a dearth, they are nervous, hungry, and defensive.
Robbing behavior. You will see fighting at the hive entrance — bees wrestling, biting, and tumbling on the landing board. Robber bees from stronger colonies are trying to steal honey from weaker ones. This is the single most dangerous consequence of a dearth for your apiary.
Bees investigating everything sweet. During a dearth, forager bees scout any sugar source they can find — your soda can, the hummingbird feeder, your neighbor's fruit trees. If bees are suddenly interested in your lunch, the flow has ended.
No fresh nectar in the hive. Open a frame and look for uncapped, glistening nectar in the top corners. During a flow, there is always fresh, wet nectar being processed. If every cell is either capped honey or dry, nothing is coming in.
Bees fanning less. During a heavy flow, guard bees at the entrance fan constantly to evaporate water from incoming nectar. When fanning stops, so has the nectar.
What to Do: The Dearth Management Plan
1. Reduce Entrances
Install an entrance reducer on every hive, especially weaker colonies. A smaller entrance is easier for guard bees to defend against robbers. During a severe dearth, reduce to the smallest opening — just one or two bee-widths.
2. Install Robbing Screens
A robbing screen is a mesh barrier that mounts over the entrance. Resident bees learn the detour path quickly; robbers cannot figure it out and give up. This is the most effective anti-robbing tool available and costs under $15.
3. Feed If Necessary
If stores are low (less than 20 pounds of capped honey — roughly 3–4 medium frames), feed 1:1 sugar syrup using an in-hive frame feeder or a top feeder. Internal feeders are critical during a dearth — external feeders (like entrance feeders) advertise sugar syrup to robbers and make the problem worse.
Never feed during a robbing event. If robbing is actively happening at a hive, adding sugar syrup intensifies the assault. Close the entrance, install a robbing screen, and wait until the frenzy dies down (usually by nightfall) before feeding internally.
4. Stop Inspecting (Or Inspect Very Quickly)
Every time you open a hive during a dearth, the smell of honey broadcasts to every colony within a quarter mile. If you must inspect, do it fast — under 5 minutes — and close up quickly. Avoid leaving frames exposed in the open. An inspection that takes 20 minutes during the spring flow should take 3 minutes during a dearth.
5. Remove Empty Supers
Any empty or mostly-empty honey supers should come off during a dearth. Extra boxes give small hive beetles and wax moths room to breed, and the colony expends energy patrolling space it does not need. Consolidate the colony into the minimum number of boxes they are actively using.
Long‑Term: Planting Your Way Out of Dearths
The most sustainable solution to nectar dearths is planting forage that blooms during the gap. Fast-growing buckwheat can be sown in successive plantings every 2–3 weeks throughout the summer — it blooms 30 days after sowing and provides both nectar and pollen. Sunflowers, anise hyssop, and bee balm are all summer-blooming powerhouses.
See our bee garden guide for a complete seasonal planting calendar designed to eliminate dearth gaps.
Dearth Survival Kit
Related reading: Learn to identify what your bees are foraging by pollen color to see a dearth coming before your colony shows stress. Our beekeeper's monthly calendar maps dearth periods by region so you can prepare weeks in advance.