Protecting trees and shrubs in winter

2023-05-07 00:40| 来源: 网络整理| 查看: 265

Root injury

Roots do not become dormant in the winter as quickly as stems, branches and buds. And roots are less hardy than stems.

Roots of most trees and shrubs that grow in Minnesota die at temperatures at or below 0 and up to 10 degrees F. These plants survive in Minnesota because soil temperatures normally are much higher than air temperatures and because soil cools down much more slowly than the air temperature.

Many factors influence soil temperature.

Moist soil holds more heat than dry soil, so frost penetration will be deeper and soil temperatures colder for sandy or dry soils. Snow cover and mulch act as insulators and keep soil temperatures higher. With newly planted trees, cracks in the planting hole allow cold air to penetrate into the root zone, reducing fall root growth or killing newly formed roots. Reducing root injury Cover roots of newly planted trees and shrubs with 3 to 4 inches of shredded wood mulch. Create a "donut" of mulch by pulling the mulch away from the trunk about 6 inches. This will prevent unintended roots from forming and ultimately girdling the tree. If the fall has been dry, water heavily before the ground freezes to reduce frost penetration. Check new plantings for cracks in the soil and fill them with soil. Frost heaving

Repeated freezing and thawing of the soil in fall or spring causes soil to expand and contract, which can damage roots and heave shrubs and new plantings out of the ground. A 4- to 6-inch layer of mulch will prevent heaving by maintaining more constant soil temperatures.

【本文地址】

公司简介

联系我们