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Winter Care for Perennial Plants

Yarrow, Achillea millefolium (alternative names Common Yarrow, G image by Tamara Kulikova from Fotolia.com

Perennial flowers and plants have few maintenance needs and provide beauty in your garden for years. In cold climates (north of zone 6), perennials need winter protection, especially if you live in an area with repeated freeze and thaw cycles. Don't cut perennials back until late winter. The dead stalks provide shelter and food for birds, as well as insulation for the perennials' roots.

rose bed. image by mdb from Fotolia.com

Apply a 2-inch layer of mulch in late fall before the first freeze to your perennial garden. Mulch protects the roots of your perennials and prevents the plants from being heaved out of the soil by repeated freezes and thaws. Remove the mulch in late spring before new growth emerges.

roses rose, rose.. image by Christophe Hamerlik from Fotolia.com

Wrap burlap around the base of roses, or mound soil 3 to 4 inches up around the plant. Bring tender perennials like dahlias or potted perennials indoors and store in a dark, cool place.

Tulips image by newbeltane from Fotolia.com

Cut back dead stems in late winter with hand pruning shears as new growth is emerging. Throw away old growth to prevent disease.

Overwintering Perennial Plants

The dead growth and debris around perennials causes pests and diseases to infest the plants during the winter months. Fertilizer applied in the fall promotes new growth that could be damaged during the winter months. Older perennials show their age with dead spots in the middle or fewer blooms each year. The dead spots are removed, which lowers the chance of diseases or pests attacking the plant. Mulch keeps the perennial plant root system warm. Plastic does not allow the soil to breath. Container perennials do well when you bury the entire container in the garden until spring.

Tip

Consult a local nursery expert or county extension office to choose perennial varieties suitable to your area. Add plenty of organic material like compost or manure to your garden beds when you first plant your perennials. Perennials are often killed in winter when their roots sit in frozen water. Well-drained soil prevents this problem. Plant less hardy perennials next to your house or in a place sheltered from freezing winter winds.

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