Winter Composting: Keeping Your Pile Active Through Cold Months

Composting doesn't pause for winter. Decomposition slows in cold temperatures, but bacteria, molds, and mites remain active and need energy. With preparation, winter composting is manageable for most gardeners.

Pre-Winter Preparation

Harvest finished compost before winter. Use it in beds, raised gardens, or store in lidded containers for spring. This frees bin space for new material.

Insulate bins in harsh climates: stack straw/hay bales or bagged leaves around bins to protect beneficial organisms from freezing.

Managing Winter Compost

Same layering principle: alternate greens (kitchen scraps, fresh garden waste) with browns (straw, newspaper, dead leaves).

Key difference: Turn minimally. Frequent turning loses precious heat. Cold slows decomposition—chop scraps smaller, shred leaves with a mower. Keep moist but not soggy.

Spring transition: Piles may be waterlogged after freeze-thaw cycles. Add extra browns to absorb excess moisture.

Pro tip: Keep a lidded kitchen scrap bucket by the back door. Fewer cold trips; pre-decomposition begins indoors with minimal odor.