How Late Frost & a Cold Spring Affects Fruit Trees
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- Опубликовано: 3 июл 2024
- In this video, Ross discusses the vulnerability of early-blooming fruit trees to late frost, particularly focusing on apricots, plums, and pluots. He advises viewers to mitigate risk by selecting late-blooming varieties and employing protection methods such as planting in sheltered areas and using techniques like thermodynamic heating or sprinkler systems. Ross underscores the uncertainty of fruit production due to potential frost damage at different stages of growth, emphasizing the importance of understanding temperature thresholds for bloom stages.
Michigan State University's damage threshold chart: www.canr.msu.edu/fruit/upload...
Introduction to Frost Concerns (0:00): Ross discusses the impact of late frost on fruit trees, particularly those with early blooms like apricots, plums, and pluots, highlighting the susceptibility of these trees to damage.
Selecting Late-blooming Varieties (2:14): Ross advises viewers to choose varieties that bloom later to mitigate the risk of frost damage, showcasing a Green Gauge Plum as an example of a late-blooming option.
Protection Methods (3:25): Ross suggests planting trees in sheltered areas, utilizing microclimates, thermodynamic heating, and even employing techniques like sprinkler systems or Christmas lights to protect trees from freezing temperatures.
Understanding Temperature Effects (4:28): Ross references a study by Michigan State University regarding temperature thresholds for different bloom stages, emphasizing the importance of temperature over frost in determining potential damage to flowers and fruits.
Uncertainty of Fruit Production (5:07): Ross explains the risks associated with fruit production despite trees being in their fifth season, highlighting the unpredictable nature of fruit set due to potential frost damage at various stages of growth.
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Zone 7A - Greater Philadelphia 
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Great info today is the first day of spring and here in TN it was 29 this morning
Needed that! Was bracing in 9b on a Florida Prince peach in bloom for the first time. "She" pulled through seemingly ok. Low of 42F
Weather is crap this year. It was super warm and now its back to freezing temperatures. It's screwing with a lot of my plants too. Its also been overly wet and now its starting to be too dry. Hopefully things get into stability soon.
Very interesting information!
Thank you for sharing the link to the "critical temps for fruit trees" chart--very helpful. Maybe you can get them to add figs!
Good comments. Thanks for the University link. mid-Missouri zone 6b
Between 2019 and 2023, except for 2022 I had zero crop of apricots and peaches due to late frosts in April.
This spring I am trying to protect my trees already blooming with a biostimulant frost protection spray. It contains succinic acid and 2-aminoethanol, monoester with boric acid. It claims to improve the freezing tolerance of stone fruit blossoms down to 25F. At the very time of writing this comment we are in a night cold snap with temps dropping down to 25F. I wonder if this stuff will live up to the expectations.
Nice video Ross! Which apricot varieties have you planted? (I’m thinking of a Harcot or a Blenheim for their incredible taste). Is your early blush still your best tasting apricot or did you try better ones? Thank you!
Early blush is incredible.
I picked up orange red and sugar pearls.
Thanks, Ross! Could you give us some experience on why you find fig trees tolerate late frosts well? I thought they were more on the sensitive side?
They wake up late. They can also regrow after damage and still fruit. Not many other fruiting plants can do that reliably.
Have you tried keeping a shade cloth over your early flowering trees to keep them dormant longer and wait out the risk of frosts.
No. Trees mostly get the signal to wake up from the soil temperature.
Good info. Can a shade cloth protect a young tree from frost damage?
Depending on how severe it is. Frost settles.
A thick frost blanket can protect a young tree especially if there are strong winds that evening. Many people use them here with great success
Thanks for workable tips.
Hey Ross, so most of my young fish did not fare well over the winter. I'm pretty sure they got damaged all the way to base. When should I expect growth from ground to know if the whole tree made it or is dead?
Figs lol it auto corrected to fish
Great recommendations. Does your fruit get affected by pests, by the way? I'm asking because my Italian plums, nectarines, apples, and pears all get attacked by codling moth and plum curculio. I've decided to start spraying this season after petal drop.
Can't grow plums here without spraying for plum cucurlio. Everything else I've been able to avoid.
@@RossRaddi Thanks.
I would think you would just set a structure up, and cover with frost cloth--or else, just cover with frost cloth.