3 Things to Know About Protecting Plants From Frost With Water

Water protects blossoms by releasing heat as it freezes Running sprinklers continuously through a frost keeps blossoms at 32°F, which is cold enough to avoid damage. Start before the frost hits and do not stop until the ice melts naturally.

Stopping the sprinklers early will kill the buds If you turn off the water before the ice has fully melted, the temperature can drop suddenly and damage the blossoms. Keep them wet until the ice is gone.

Covers work only if they trap heat, and plastic is useless Frost cloth or fabric covers must reach the ground to trap heat. Plastic creates a cold greenhouse effect and does not protect. Tarps and trash bags do more harm than good.