Overwintering Carnivorous Plants in Extreme Cold (Upper Peninsula Michigan)

Root Cause: Insufficient Summer Light

Stringy pitchers = low light, not temperature. Plants need full sun (≥6 hrs direct) to build sugar reserves for winter survival. Weak plants die in harsh winters.

Winter Strategies

• Garage storage (3 months): Keep cool; if too warm, plants break dormancy and need intense light. Alternative: refrigerator (36–42°F).
• Fungicide: Spray heavily with sulfur-based fungicide indoors; avoid copper.
• Ice-layer method: After 1 week of frost, trim all leaves to base. Keep in shallow water. When temps stay below freezing, pour water over plants to form protective ice layer.

Detailed techniques in our e-book. See care sheets for basics.