Texas Cooperative Extension,
Texas A&M University, College Station, Texas

November-December 2005


Fall Is For Mulching



By Cathy Wilkinson Barash


The single most timesaving practice for any gardener is using mulch around garden plants. Mulching goes hand in hand with planting - in fall or any other time of the year. You can buy various types of mulch or use leaves (chopped, shredded, or composted) or other garden material you already have.

Mulch performs several functions. A layer of mulch at least 3 inches thick produces a barrier to weeds; most weed seeds in the ground do not have enough light and air to grow through the mulch. In addition, the ground is protected from weed seeds dropped by birds or animals.

An organic mulch, such as bark nuggets, shredded bark or wood, chopped leaves, pine needles, leaf mold (composted leaves), or cocoa hulls, conserves water. Water the plant and surrounding soil well, add the mulch, and then water again. Take care to keep the mulch an inch from the plant stem or you risk suffocating it. The mulch prevents moisture evaporation from the ground, especially in the heat of summer. Using organic mulch has an added bonus; as the mulch decomposes, nutrients enrich the soil.

Mulch Insulates the Soil for Winter

Mulching is even more important at this time of year as the weather changes and the temperatures drop. A three- to six-inch layer of organic mulch helps maintain soil temperature. In areas where the ground freezes. Lack of winter mulch leads to the death of many perennials and small shrubs as the roots are exposed to freezing air and the plant dies.

In cold-winter regions such as the Panhandle, wait to add winter mulch until the ground has frozen. If you mulch too early in fall, the mulch will keep the soil at above-freezing temperatures and encourage the plant to keep growing. Unfortunately, the tender new growth is susceptible to the cold air temperature and is likely to be killed. Normally, as the temperatures fall, plants go into dormancy, which prevents most dieback.

Even though they are not visible in fall, most spring-blooming bulbs benefit from a good winter mulch, as do hardy perennials that have died back to the ground. Hybrid tea and grandiflora roses need a good muching to make it through sub-freezing winters. Make a note to begin removing the mulch in late winter to early spring as days start to warm; you don't want to miss any of the spectacular early show of color that begins with small bulbs nd woodland perennials and continues through spring and into summer.

Organic gardeners will want to make sure that mulches they purchase do not contain recycled wood with CCA (chromated copper arsenate, an arsenic-based pesticide that's registered and controlled by the EPA). Bags of mulch with the Mulch & Soil Council (MSC) certification logo will identify the ingredients of the mulch. MSC certified mulch is available at many major nurseries and garden centers. Home Depot stores were the first to require mulch suppliers to certify their products.



This article was written by Cathy Wilkinson Barash, Past President, Garden Writers Assn.
Earth Kind uses research-proven techniques to provide maximum gardening and landscape performance while preserving and protecting the environment. For more information on Earth Kind Landscape Management Practices see our web site: http://earthkind.tamu.edu