Temperature | Type | Effect on Plants |
---|---|---|
Down to 28° F for a couple of hours | Light Frost, Light Freeze | Usually only harms very tender plants. Ice forms only on the outside of the plant. |
25-28° F for several hours | Hard Frost, Killing Frost, Moderate Freeze | Damages foliage and blossoms. Ice forms inside the plant, causing plant cells to burst. Will kill back root-hardy perennials and damage crops. |
Below 25° F for several hours | Severe freeze | Causes damage to many plants, mostly through desiccation (drying). |
Labels: late freeze, record lows, spring, Tulips