Frost ???

Joined
May 17, 2023
Messages
1,853
Reaction score
551
Location
Lebanon, Missouri
Country
United States
They are calling for frost Tuesday and Wednesday but only suppose to get down to 38F both days.

I'm thinking bring in my For Sale plants and Tropicals the others mainly wait and see.

What do you think?

big rockpile
 
Joined
Feb 13, 2021
Messages
3,894
Reaction score
2,474
Country
United Kingdom
Bring in any non-hardy plants you can, That is usually restricted by time or space, so go for the important ones first, but it won't hurt anything not being cold. The only exception I can think of is amaryllis which need a cold period to flower next year
 
Joined
Jun 20, 2024
Messages
474
Reaction score
233
Location
Quitman, Ga.
Country
United States
38 is too warm for frost. Frost forms at freezing which is 32° f. If you have tropicals that can't withstand 40°f or below, bring those in.
 

Meadowlark

No N-P-K Required
Joined
Feb 5, 2019
Messages
2,818
Reaction score
2,367
Location
East Texas
Hardiness Zone
old zone 8b/new zone 9a
Country
United States
38 is too warm for frost. Frost forms at freezing which is 32° f. ...
Not true. I've had it form at 38 deg F many times and it will kill tender vegetation.

According to National Weather Service, "exposed surfaces temperatures from 38 to 42 F can lead to patchy frost, 33 to 37 areas of frost, and 32 and below widespread frost/freeze."
 
Joined
Jun 20, 2024
Messages
474
Reaction score
233
Location
Quitman, Ga.
Country
United States
Not true. I've had it form at 38 deg F many times and it will kill tender vegetation.

According to National Weather Service, "exposed surfaces temperatures from 38 to 42 F can lead to patchy frost, 33 to 37 areas of frost, and 32 and below widespread frost/freeze."
That's true when soil temps are cold. Soil temps are not cold enough until after the temperatures have been below freezing during the day. This is how I was taught. The air temperature at soil level has to be @freezing for frost to damage plants when the air temps are above freezing because warm soil radiates heat. At 38° f, with soil temps above freezing, no frost is going to land on the plants.
 
Joined
Aug 27, 2024
Messages
23
Reaction score
16
Location
Kent
Country
United Kingdom
We had our first air frost last night. The garage roofs had turned white. Most tender annuals - even banana plants which are sheltered close to the house - are still OK. So nothing like a ground frost which would finish these off. A warning sign to protect or bring in anything vulnerable.
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Members online

Forum statistics

Threads
27,884
Messages
264,734
Members
14,619
Latest member
surgitronix

Latest Threads

Top