Heating hives in winter
For more than 60 years, my work and passion have been dedicated to apiculture. During this long period, I have observed that the greatest challenge for many beekeepers is not honey production, but successful wintering of colonies. Three years ago I moved from Albania to the United States, mainly to the state of Connecticut. While spring and summer conditions for beekeeping in this region are generally favorable, winter can be very harsh. Temperatures may fall to -20°C (-4°F) or even lower during cold waves. Such prolonged cold periods often result in significant colony losses. Even when colonies survive, they frequently emerge from winter weak and are unable to take advantage of the early spring nectar flow.
A practical heating approach: To reduce winter losses, I experimented with a simple and inexpensive method: supplemental electric heating of beehives. The system uses small electric heating pads commonly sold for pets or household use. These pads usually operate at 15-25 watts, producing a gentle and stable heat source. The heating pad can be placed beneath the hive floor, or along one side of the hive, carefully protected from moisture.
The purpose of this method is not to artificially warm the hive to summer conditions, but simply to prevent extreme temperature drops and reduce the energy bees must expend to maintain cluster temperature. Field observations suggest that this system helps maintain approximately 10-12°C (50-54°F) in the lower hive area near the cluster, while the central cluster temperature remains close to 20-25°C (68-77°F).
Observed benefits: In my experience, colonies wintering with gentle supplemental heating show several advantages: higher winter survival rates; stronger colonies at the end of winter; reduced consumption of stored honey; continuous, though slow, colony development; and lower stress levels within the colony. These colonies also appear less susceptible to diseases such as nosema, and treatments for varroa are often more effective when the colony remains strong.
Spring development: An important benefit is that colonies exit winter stronger and more populous, allowing them to fully exploit the first nectar flow of spring, which is often the most valuable period for honey production.
After decades in beekeeping, I have learned a simple lesson: Healthy bees require stable living conditions. If beekeepers invest a little effort in improving winter conditions, the bees will reward them with strong colonies and better honey yields. As beekeepers, we should remember: Provide the bees with good living conditions — just as we try to provide them for ourselves.
Mitro Saqellari
Windsor Locks, Connecticut
