Protecting Your Garden Plants From the Cold — Seattle’s Favorite Garden Store Since 1924 – Swansons Nursery

Insulate

Cover or wrap vulnerable plants with burlap, old blankets or towels, straw or something else to create insulating air around the plant, such as Harvest Guard’s Plant Protection Bag (top right). Remember to tie or weight down your cover material. Also, you can mulch over roots of perennials or shrubs that might be affected, with compost, leaves or conifer boughs. Note that a layer of snow actually helps insulate plants! Dry cold is the bigger threat.