Winterizing Raised Perennial Beds in Saskatchewan (Zone 3b)

In Moose Jaw, Saskatchewan (USDA Zone 3b), raised beds expose roots to deeper cold. A systematic approach protects perennials like lilies and daisies.

Fall Preparation Timeline

1. Now: Cut back dead/dying foliage; compost healthy material, burn diseased.
2. After killing frost: Trim remaining dead tops to 5 cm.
3. Mulch heavily: 15–20 cm clean straw over entire bed.
4. Shield sides: Bank straw against exposed bed walls, especially north face.
5. Marginal plants: Lift Zone 4+ perennials; store in cool basement or treat as annuals.

Bulb Storage (If Planted in Boxes)

• Garage storage is fine if it stays above -5 °C.
• Better: netted bags in cool (2–5 °C), dark, dry basement.
• Replant in spring after soil warms to 10 °C.

Zone 3 hardy perennials tolerate frozen soil; the mulch buffer prevents lethal temperature swings.