Overwintering Venus Flytraps in a Michigan Bog Garden: Mulch Depth and Timing

A SE Michigan (zone 5–6) grower had flytraps in a bog garden that thrived all summer. Asked about mulching vs. garage vs. Styrofoam after frosts and mild freezes.

Proven Method

• Customers in similar zones (even Toronto, zone 4) succeed with 4–6 inches of mulch (pine needles, aspen bedding, straw, wood chips).
• Styrofoam works but mulch is standard.

Timing

• Apply after a series of frosts, when daytime highs are in the 40s°F (plants fully dormant).
• Spray sulfur fungicide before mulching.

Spring

Uncover and spray fungicide again.