Why Temperate Sundews Fail in Basement Dormancy: The Outdoor Advantage

A grower's temperate Drosera intermedia thrived summer through fall, formed hibernacula, overwintered in a cool basement with fungicide treatments, but died upon spring emergence. What went wrong?

The Indoor Dormancy Trap

Temperate sundews are easy to overwinter outdoors but challenging indoors. Sarracenia Northwest's plants survive 8°F frozen solid in pots—emerging vigorously each spring. Indoor failures stem from two factors:

1. Temperature Not Cold Enough

Basements rarely maintain near-freezing temps (32-35°F) required for proper dormancy. Warmer conditions prevent deep dormancy, leading to weak spring emergence.

2. Fungal Management Limitations

Sulfur fungicide prevents spore germination but doesn't kill existing spores. As new growth emerges without sulfur coating, latent spores infect tender tissue. The white substance observed post-death was likely fungal proliferation.

The Solution: Repotting at Spring Transition

Moving plants from dormancy to growth? Repot into fresh soil. This removes accumulated spores and provides clean media for vulnerable new growth.

Nursery Protocol

• Overwinter temperate sundews outdoors whenever possible
• Use sulfur as preventative (longer-lasting than sporicides)
• Repot at dormancy break
• Consult detailed winter care guides for your climate

Don't give up on temperate sundews—many customers grow them for years following outdoor dormancy protocols.