Honey fermentation
Honey fermentation is a spoilage process caused by yeasts that are naturally present in honey. Fermentation occurs when honey moisture content is too high (typically above 18.6%) and yeasts become active, converting honey sugars into alcohol and carbon dioxide. Fermented honey has a bubbly appearance, sour taste, and may have an alcoholic odor. Fermentation degrades honey quality, flavor, and marketability. Preventing honey fermentation is crucial for maintaining honey quality and shelf life. High moisture content in honey is the primary factor contributing to fermentation.
- Harvest honey at lower moisture content5
Harvest honey only when its moisture content is below 18.6%, the threshold above which naturally present osmophilic yeasts can activate and cause fermentation. Wait until bees have fully capped at least 80% of the comb cells before pulling frames, as capping indicates sufficient dehydration.
📌 best practice4/16/2025, 9:22:02 PM
🛠️ Refractometer
- Proper honey storage4
Store honey in airtight, food-grade containers in a cool, dry environment to prevent moisture absorption that leads to fermentation. Honey is hygroscopic and will draw water from humid air if left exposed, raising its moisture content above the safe 18.6% threshold.
📌 best practice4/16/2025, 9:22:02 PM
🛠️ Airtight containers
- Pasteurization (heating)2
Heat honey to 63°C (145°F) for 30 minutes or to 71°C (160°F) for 1-2 minutes to kill osmophilic yeasts responsible for fermentation. This is particularly useful for honey with borderline moisture content (17-20%) where storage alone may not prevent yeast activity.
📌 diy4/16/2025, 9:22:02 PM
🛠️ Heating equipment, thermometer