Mulching Bog Gardens in Winter: Timing, Materials, and Covering Techniques

You're in Zone 5 (90 miles north of NYC) with snow on the ground and plants already cut back. Here's how to handle mulching now.

Timing Decision

• If cold weather continues: Spray fungicide on what you can, then mulch and cover immediately.
• If a thaw is forecast (40s°F days, dry period): Wait for snow to melt, spray fungicide thoroughly, then mulch.

Covering Materials

• Black plastic or opaque tarp ONLY. Clear plastic acts as a greenhouse—temperatures spike dangerously on sunny days (I've nearly killed plants this way).
• Burlap is excellent for direct plant coverage before mulch.

Current Conditions Note

It's actually colder in Oregon right now (teens overnight) than your area. We have everything wrapped up.

Good Growing!

Jeff Dallas
Sarracenia Northwest
www.cobraplant.com