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Topic: Frost expected
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thirsty

5/17/2017 10:18:11 PM
Member since:
Dec 2008
Total posts:213
Frost expected

With the temp expected to drop below 0 tonite, need some quick advice on keeping my cherry tree flowers from freezing.

 
 
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Giddyup

5/17/2017 10:24:45 PM
Member since:
Apr 2013
Total posts:124
cover or spray with water

If it's not too big cover it with a tarp. If it's too big for that, then spray it with water. The water will freeze, but the buds will be protected .... fruit farmers do that all the time to protect their plants. Good luck

Adam

5/17/2017 11:13:57 PM
Member since:
Mar 2005
Total posts:15012
Cherry

What kind of cherry if you don't mind my asking?  
 
FWIW we had a -3 on May 15 last year and my 3 cherries (which were in bloom) and 2 apples all fruited quite well. Maybe someone has more relevant local info, but I'm going by the link below for an idea:  
http://msue.anr.msu.edu/uploads/files/PictureTableofFruitFreezeDamageThresholds.pdf  
If its accurate, -2 on a sour cherry in bloom would be more toward 10% kill. If it gets to -4 to -5 thats when things start to get scary.

If its any consolation, they were at one point calling for -2 again on Thursday night but that's been changed to zero. 

thirsty

5/17/2017 11:23:06 PM
Member since:
Dec 2008
Total posts:213
Let's

Hope for the best. Thank you

Adam

5/18/2017 8:50:48 AM
Member since:
Mar 2005
Total posts:15012
Minus

How did you make out?  
The lowest hourly reading from Env Canada was -1.4 (at the airport), possible it got a little lower than that between hours before it turned.  
 
I have four different cherry varieties in bloom this year. I'm learning as I go along and would love to hear from someone more experienced, but from what I can tell in using this as a guide ( http://msue.anr.msu.edu/news/assessing_frost_and_freeze_damage_to_flowers_and_buds_of_fruit_trees ) it does look like Juliet and Romeo took a light hit... but any of it I've seen looks more like the first cherry picture than the second so am hoping I'm okay. Cant find any evidence at all of any issue with Evans or Crimson Passion... whether it's because of where they're planted, the fact they've been in the ground longer or the fact that they're a few days behind the others in terms of how far into bloom. 
 
For apples, one is already taking the year off so not a freeze concern. The other looks the same as it did yesterday.  
 
Unfortunately it looks like the forecast for tonight is changed to expect another low of -2.

Adam

5/19/2017 7:56:07 AM
Member since:
Mar 2005
Total posts:15012
-4

Lowest hourly reading from Env Canada got all the way down to -4 last night (or -3.5). -3 or colder for at least two hours. Anything of mine looks about the same as it did yesterday. Knock on wood, but the lowest overnight temp anywhere in the long range forecast from here is +2

JessieJay

5/19/2017 8:03:48 AM
Member since:
Mar 2016
Total posts:321
Brrr

-7 on my thermometer this morning. (Cottonwoods)


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