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Suddenly, a cold front moves in with plummeting temperatures and the frost damage to apple blossoms is devastating. A high temperature is usually considered to be 38C or above. what is the highest temperature that frost will occur Frost is a bunch of minute ice crystals that settle and form on solid objects or surfaces. It will also cause disorder in the movement of water across your plant cells. Plants can tolerate a wide range of temperature ranges, but there are specific threshold temperatures that must be met before they will grow and flourish. Protecting Cucumbers from Cold Cucumbers (Cucumis sativus) are tender annuals that thrive in warm temperatures of between 65-75 degrees F. (18-23 C.). Frost at 35 degrees - how does that happen? | WSTM Most gardeners keep fabrics and covers on hand to protect plants from cold. I have found that with seedlings I prefer to use cloches, but with entire beds, netting cloches work and wrapping trees and aloes in cloth definitely helps them survive. Can you use tarps to cover plants from frost? It's true that frost can only form when the surface is at or below freezing. Current Hazards How Do You Make a Frost Cover For Plants? what is the highest temperature that frost will occur What is hoarfrost? | AccuWeather Never use plastic of any kind, including black plastic garbage bags, to cover plants, as plastic conducts cold to the leaves and will increase the likelihood of damage to the plant. Additionally, it is a good idea to place black plastic containers full of water in the greenhouse as they will also absorb heat during the day and radiated out at night to ensure that your plants are protected. Some plants will show symptoms of frost damage on their leaves quickly while others may not show their symptoms until they have been damaged by moisture on their roots. 1. Usually such days are the culmination of a period of northerly winds during which temperatures gradually rise.