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How to Protect Fruit Trees from Frost

1/17/2013 10:17:00 AM

Tags: fruit trees, fruit orchard, frost, frost damage, frost protection for fruit trees

How can I prevent a late spring frost from damaging our fruit crop? frosty apple tree 

You can take several fairly simple steps to reduce the risk of frost damage to buds, blossoms and fruit without using heaters, commercial wind machines or overhead sprinklers, according to the University of California, Davis’ article Principles of Frost Protection. First, before planting fruit trees of any kind, choose the location carefully. Avoid planting at the bottom of a slope — where frost accumulates — or on cold hilltops. If possible, plant on a north-facing slope to help delay blooming and thus avoid frost damage. The Alabama Cooperative Extension System (ACES) suggests checking seed catalog descriptions and choosing fruit varieties less susceptible to frost damage in order to find varieties that bud and bloom later, when frost is less likely to occur.

For existing fruit trees, ACES recommends putting off pruning until late winter to early spring to stall budding and blooming. If frost is in the forecast when trees are in bloom and the soil has been dry, water the soil a day or two beforehand to a depth of 1 foot (wet soils radiate more heat than dry soils do). To trap extra warmth, the UC Davis article says to cover the wet soil around the bases of the trees with clear plastic until the danger of frost has passed. If you’re using a cover crop, mow it and remove vegetative mulch (at least temporarily). Bare soil — or soil covered with clear plastic — stores and radiates more warmth.

ACES also notes that frost blankets can provide frost protection for fruit trees and small fruits. When you place frost blankets around tree trunks, be sure to anchor them on the ground to trap the soil’s radiant heat.

— Vicki Mattern, Contributing Editor 

Vicki Mattern is a contributing editor for MOTHER EARTH NEWS magazine, book editor and freelance magazine writer. She has edited or co-authored seven books on gardening, and lives and works from her home in northwestern Montana. You can find Vicki on .

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Post a comment below.


9/25/2013 7:24:35 AM
Location plays an important role.

Judi Dobson
3/27/2013 5:00:00 PM
I was thinking that. I just moved north due to health. I started a group Pop's Ranch to learn and grow thi g. Wish you would join it soi we can all learn and help each other

Frank Merriman
3/8/2013 1:38:16 AM
Agreed. I usually toss a blanket over my trees as I have a wire fence surrounding each tree (Deer protection) It is a pain and a better idea would be nice. I don't think there is one. Keeping roots warm may help the tree but the blossoms would be toast. IMHO.

Catina Hoak
2/19/2013 8:26:28 PM
I was thinking the same thing....what about the blossoms?

Betty Dettwiler
2/19/2013 7:34:07 PM
This is probably the most stupid article I have ever read. Trust me, if you get a late freeze or frost after blooming, you are not going to get fruit because you wrapped the trunk or soaked the ground. The blossoms will fall off.

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