The Disadvantages of Mulch in Vineyard Management

Disadvantages Of Mulch

• Mulching in vineyards, especially over-mulching, and mulching of poorly drained soils can lead to decline of grape vines. Mulch can reduce vigor of young vines, which can translate into poor production. Mulch can retain too much moisture causing root rot and eventual death of grapevines. Mulches of synthetic materials, such as plastics, can leach chemicals into the soil which harm grapevines. Mulches also can provide habitat for rodents and increase the likelihood of fire.

Other Weed-Control Methods

• Grape growers who opt not to use mulch on their vineyards must choose other methods. The least disruptive method to the roots and vines is to hand-pull weeds. This is not practical for the larger vineyard. For medium-size vineyards, the use of a hoe may be employed to cultivate the weeds growing between vines. Larger producers will probably opt for chemical control. Herbicides that are specifically labeled for use in vineyards must be used because grapes are very sensitive to many traditional herbicides.

Recommendations

• Mulch can be used selectively in vineyards to both reduce weeds and still be done so without harming your vines. Between-rows mulching is a beneficial method without compromising vine production and quality. A 2- to 3-inch layer of a finely ground bark or sawdust, or a 6- to 8-inch layer of loose straw (not hay) can be placed in the middle of grape rows.

Benefits of Mulching

• A 2- to 3-inch layer of mulch around the base of the vines can help weeds that compete for the same water and nutrients the grapes do. Mulching can help to regulate soil temperatures as well. On well-drained soils, mulch can help to conserve moisture and reduce erosion. Some mulches can also add nutrients to the soil as they decompose.