.png)
Driving across southeastern and central South Dakota last week, it is official, the state’s premier honey-producing plant has punched the clock. Yellow Sweet Clover (Melilotus officinalis) began blooming, roadside, around June 6, springing forth within its historical first-to-second-week-of-June baseline.
The on-time emergence of yellow sweet clover—which typically precedes white-flowered varieties by 10 to 14 days—indicates that the seasonal transition is proceeding as expected. However, the outlook for June hinges on a few key atmospheric factors. While forecasted above-average temperatures should boost daily foraging productivity, a strengthening high-pressure ridge is currently reshaping conditions across the Upper Midwest, leading to significant regional variations and an intensifying threat of moisture stress.
For commercial outfits and sideliners alike, this setup promises a high-velocity nectar flow and the real likelihood of an abrupt shutdown with shuffle from expansion to total colony preservation.
When soil moisture holds, an on-schedule yellow sweet clover bloom provides distinct biological advantages for honeybee colonies. In dry sunny plains conditions, Melilotus nectar routinely tests at over 50% sugar content, compared to the 20% to 30% average found in many wild spring forage plants, like dandelion. Foraging bees carry twice the carbohydrate payload per flight, which dramatically accelerates honey super filling and reduces the internal hive energy required to evaporate and cure the honey.
An early June start hits right as strong, well-managed colonies are reaching peak brood-rearing velocity. The immediate abundance of high-quality nectar and pollen sustains a massive foraging workforce, completely bypassing the late-spring “June dearth” gaps seen in other parts of the country. The yellow sweet clover blooming now allows colonies to build tremendous momentum just as white sweet clover (Melilotus albus) and alfalfa (Medicago sativa) begin to open later in the month, creating a potential 4-to-8 week nectar runway.
The regional honeybee forecast reveals a highly dynamic fractured landscape. The sweet clover flow outlook varies sharply depending on whether your operations are positioned in the western High Plains or moving east toward the Mississippi Valley.
Montana & Wyoming saw a volatile spring, with late-May and early-June weather systems delivering moderate-to-heavy precipitation across the Northern Rockies, leading to significant drought improvement, according to NOAA’s Climate Prediction Center. Early-season moisture is a massive win for honey production. Sweet clover stands are heavily charged with subsoil moisture. Combined with seasonal warming, western operators can expect a robust, stable nectar flow with longevity. Elevated temperatures will trigger peak flight hours in irrigated valleys and river basins, yielding a high-volume, low-moisture honey crop.
South Dakota and North Dakota are poised for a fast and furious high-velocity nectar flow carrying a significant flash drought risk. Data from the U.S. Drought Monitor indicates a building mid-level high-pressure system driving unseasonably warm air into the Dakotas, hand-in-hand with enhanced chances for below-normal June precipitation. A drying trend is actively expanding into northern and eastern South Dakota and across North Dakota.
With daily highs in the 80s and low 90s F, flight hours and nectar secretion are optimized, but the lack of rain makes the runway short. A “flash drought” shutting down the flow early is a distinct possibility; if temperatures spike into the mid-90s F with no precipitation, the plants will suffer moisture stress, leading to the early cessation of nectar secretion.
In Minnesota, hot, dry air masses have caused a widespread degradation of topsoil moisture over the first week of June and NOAA indicates a drier-than-normal month of June across the Mississippi Valley. Dry conditions, where the mix of sweet clover, Dutch white clover and basswood (Tilia americana), form the foraging base, are a double-edged sword. The bees will be flying, but shallow-rooted Dutch white clovers will burn out rapidly. The more deeply-rooted sweet clover and the deep-tap tree crops should sustain what is likely to be a sharp, compressed flow.
No matter where your bees are flying, the flowers are on time.The question for honey producers in the path of creeping drought is simple: Are your colonies strong enough to catch the flash flow before the heat locks it down?
Best of luck out there.
https://www.cpc.ncep.noaa.gov/products/expert_assessment/sdo_summary.php?hl=en-US#
https://droughtmonitor.unl.edu/
Marcus Hill is a commercial beekeeping veteran and strategic consultant with 18 years and over 100,000 hours of professional practice, spanning hands-on hive management, peer-reviewed ecotoxicology research, and executive leadership of large-scale commercial operations. He lives on a small farm in South Dakota with his wife Katie and their two young children.
