FROST: general rules from experience....

mojoganjaman

Well-Known Member
I use a big squirrel fan...its an old cannibalized swamp cooler...built a stand for it...when frost is a threat, I plug it in and goto bed...moving air discourages frost from forming....helps that I live 200ft from a large lake....hth




mojo
 

RetiredGuerilla

Well-Known Member
Cannabis is very frost resistant. If it gets to 28 degrees HARVEST. It depends also what the weather that day will be sunny cloudy wet ect ect and the days following. Is she in pots? You can bring her in for a day or two and put her under t-5s until the weather gets nice again. Unless you live in Cali or the deep south i would harvest. But by the looks of her shes got a few weeks.
 

GreenBoxGrown

Active Member
Lots of strains of cannabis can handle a pretty strong frost. I've had plants handle frosts as low as 28 degrees F without killing the plant.

Things to consider, some strains are more sensitive to frost than others, if they are in pots this can make them more sensitive.

Sativa strains tend to be more sensitive to frost than Indicas. Indicas and Indica dominant hybrids are capable of handling frosts as low as 28F. but there have been reports of sativas handling frosts just as well.

I'll leave this sticky open to discussion for other experienced users to post their experiences, I will compile it into this. I felt this was needed as this question gets asked a lot when a frost comes by.


you can protect the plants if they are of manageable size or if you are handy enough to build a sturdy setup.

this can be as basic as a pvc greenhouse with plastic wrapped around, or even sheets if properly secured to not touch the plants... or as large as a full car port with greenhouse grade plastic secured.


how much the temperature rises the next day also tends to define how the plant deals with the frost. if it frosts and it rises up to 65 degrees+ with sun in the daytime, the plant is much more likely to take the frost and keep growing vs a plant that takes a hard frost and sees a 45 degree day with clouds....


cooler temperatures (55-40 degrees F) will definitely bring out some purpling in some strains, and cause flowering to speed up, nights that dip into the 35F zone boost this even more, bringing out even more color.

sorry for the organization of this thread, guess I'm too much of a stoner after all ;)
I grow in a greenhouse, so I was able to add a space heater, which works perfectly!

I noticed my plants really start to slow down in terms of bud growth, when it gets really cold. The leaves also tend to turn purple in my experience.

Here's a video of my setup with a heater:
 
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sandhill larry

Well-Known Member
I'm doing a Fall/Winter seed test down here in NW Florida. I've had a few frosts, and they are hanging in there so far. This is the 5th week of flower, so they don't have far to go. I will be putting out more plants for a Spring crop early in the new year.

 

sandhill larry

Well-Known Member
I dealt with two nights of 25F back in January. Lost all 12 plants in my first round of the spring crop. I had three nights of frost last week, with lows of 33, 31 and 34F. I covered most everything. Some came through better than others.

Both of these plants are B&S X CP1, just a few yards away from each other in the patch.

138980DA-D23A-4F17-B88E-EA368E84CDDC.jpg BBE8B1B5-270F-45D1-99E2-5945E1C20503.jpg

Most of the rest were more like this Little Sister. They had a little burn on the upper buds.

5633E79B-C992-43E9-8D0A-97DB9891188B.jpg
 

driel

Well-Known Member
I didn't take pics but had a strain of congo & bagseed gsc get wiped out by an early October frost that lasted 4-5 days including a snowfall. Very sad sight indeed. Will be trying again this year but I'm trying to find some fast finishing strains that aren't autos.
 

sandhill larry

Well-Known Member
I didn't take pics but had a strain of congo & bagseed gsc get wiped out by an early October frost that lasted 4-5 days including a snowfall. Very sad sight indeed. Will be trying again this year but I'm trying to find some fast finishing strains that aren't autos.
Check out Getaway Mountain Seeds. He is the best in the early/mold resistant game.

http://getawaymountainseed.com/
 

postickslim

Well-Known Member
It is 48 degrees in Massachusetts today. My seedlings were started 3 weeks ago and I have been waiting to put them outside. I have green cush,grand daddy purple,Thai and 5 auto berry. Weather is suppose to turn Thursday and I will put them all outside most in grow bags some in a garden patch. We are expecting the temparture to get to 90 this weekend just crazy. Anybody growing outdoors in Mass or the northeast?
 

L30nPh3lps

Well-Known Member
IMG_3330.JPG IMG_3331.JPG
It is 48 degrees in Massachusetts today. My seedlings were started 3 weeks ago and I have been waiting to put them outside. I have green cush,grand daddy purple,Thai and 5 auto berry. Weather is suppose to turn Thursday and I will put them all outside most in grow bags some in a garden patch. We are expecting the temparture to get to 90 this weekend just crazy. Anybody growing outdoors in Mass or the northeast?
Hey im in mass as well, how are ur plants doing? I have one sour diesel plant growing outdoors not really even showing signs of flowering yet
 

driel

Well-Known Member
Went with Autos for outdoors this year after last years frost massacre. Grew some Great White Shark and got a couple ounces, they didn't grow as well as the indoor equivalents in the guerilla spot as it doesn't have a ton of direct sun hours.
 

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psychadelibud

Well-Known Member
I have around 30 something large plants in huge containers I have kept vegging up until the last couple weeks I am just now throwing outside.

I'm putting those out at the same time i'm harvesting others haha. So i'm looking at a mid November 1st of December harvest. I have ran them into mid November before with no problems, I think I will be okay. I am in South Eastern Kentucky.
 

psychadelibud

Well-Known Member
Screenshot_2017-10-07-03-43-15.png Screenshot_2017-10-07-03-43-02.png

This is what I mean by vegging big plants. Have 36 like this, should I leave them in the 10 gallon containers to flower them out or transplant to 20 upon setting out? What would you estimate they will yield per in the 10s? They are pretty damn big with lots of growth!
 
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