8/13/2019 In a Word: Mulch!

1/1

In Your Garden with Jenny Watts

In a Word: Mulch!

The best way to protect ornamental plants during periods of drought is by applying mulch.

Spreading mulch around your plants is, in most situations, simply good gardening. But with the

need for water conservation, mulching is a necessity.Mulches have three primary benefits:

They reduce evaporation of water from the soil.

They reduce weeds, which compete with your plants for water, by shading out weed seedlings

and inhibiting weed seed germination.

They insulate soil from extreme temperature changes, keeping the soil cooler during the day

and warmer at night.

A good mulch can even encourage worms, which aerate and enrich the soil. You can begin

now to mulch around your plants while there is still moisture in the soil.

There are several different choices in mulching materials. Organic mulches are any of the

many commonly available materials derived from decaying plant material. They decompose intime and enrich and improve the soil. They include aged sawdust, peat moss, bark, wood chips,

composted sludge products, pine needles, leaves and straw. Organic mulches will require

periodic additions as the mulch decays.

Studies have shown that two inches of bark covering the soil will reduce moisture loss in

summer by 20% and reduce soil temperature in summer, in the upper four inches of soil, by 10F.

Inorganic mulching materials include black plastic, landscape fabrics and gravel.

Landscape fabrics, also known as geo-textiles or weed barriers, comprise a variety of products.

They can be used in combination with organic mulch material to maximize the retention of

moisture in the soil.

Apply mulch around trees and shrubs 3-4 inches deep to maintain soil moisture. Keepmulch 4-5 inches away from the trunks of trees. Let fallen leaves and pine needles remain under

trees to act as a natural mulch.

Also apply mulch around annuals, perennials, vegetable plants, and even in containers.

Mulching your pathways helps control weeds and conserves moisture in the soil. Black plastic

may be used, or you can utilize grass clippings, straw, wood chips, or garden debris.

Another way of reducing evaporation is by covering plants with shade cloth. Sensitive

plants like rhododendrons and azaleas can be covered with 50% shade cloth while more heat

tolerant plants may benefit from 30% shade cloth. Position it to block sunlight while not

reducing air circulation. In the vegetable garden, cover salad greens with 50% shade cloth and

crops like squash and beans with 30% shade.

Mulch trees and shrubs now while the soil is still moist to preserve soil moisture for the

plants to use when they begin their spring growth.