How do I protect potted blueberries in winter?
Written by
Paul Reynolds
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.Winter protection for potted blueberries will prevent root death and allow for sprouting again in the spring. Container freezing occurs much faster than freezing of ground soil, which puts roots at risk. This is something I learned when I lost crops to a surprise frost one year. Insulating the plant will preserve the roots for the next growing season.
Get ready to protect if temperatures start hitting 20°F (-7°C). Pot-entangled roots freeze faster than ground-planted roots. I have a weather alert system to give me a heads up, allowing me to be proactive. Preparing early keeps you from scrambling at the last minute. Plants enter dormancy, and their roots remain at risk of freezing.
Burying Technique
- Dig trench deeper than pot height
- Place pot in center surrounded by leaves
- Cover with soil leaving crown exposed
- Mark location with stake for spring retrieval
Insulating Wrap Method
- Wrap burlap around pot securing with twine
- Stuff straw between pot and fabric layers
- Cover crown with breathable fabric
- Elevate on wooden blocks above frozen ground
Water plants sparingly during dormancy. Check the soil moisture once a month. Water the plant only when the top of the soil is dry. I water mine lightly every 4-6 weeks. Overwatering in cold temperatures can lead to root rot, while underwatering can result in desiccation.
In spring, gradually transition plants. Remove insulation once temperatures exceed 25°F for three consecutive days. Allow bushes to acclimate to sunlight for several days. Proper winter care gives my plants a stronger boost. They provide plentiful berries each summer.
Read the full article: How to Grow Blueberries in Pots Successfully
