As trees and shrubs begin to leaf out many gardeners start to get anxious to begin planting tender annuals.
Michigan State University Extension advises gardeners that they need to be prepared for late frosts.
Late season frosts typically occur on clear nights because the lack of cloud cover allows the earth's heat to re-radiate into outer space. By draping a sheet or other lightweight covering over plants, the radiant heat from the ground is trapped, preventing plants from freezing.
Cloth sheets or other lightweight fabric are a better choice for frost protection than plastic sheeting or plastic bags. Plastic transfers more heat and plant leaves may freeze when they come into contact with the covering.
The frost covers need to be removed each morning as soon as temperatures begin to warm. Since late season frosts usually occur on clear nights, the next morning is typically bright and sunny. Under direct sun, temperatures under frost covers can rise quickly, resulting in heat damage to new plant growth.
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Cloth sheets or other lightweight fabric are a better choice for frost protection. |