Outdoor night temps

Hi all
Lol more and more q's as we near finish!

Temps are cooling - some purpling. Was wondering what's the lowest temp they ladies can be exposed to ?
Don't think we'll get frost or anything yet temps are about 7degs C overnight.

Can they deal with a few nights <5degs C? Or no no - pull before?
IS the 'temp stress' good for focusing energy on buds - or just plain bad?

Thank you!

7C=44.6F
5C=41F

I'm interested in the responses from those with more experience. I'm only on my second grow and have never grown in those temps. I just wanted to convert this for those of us that use F instead of C.

With that said, I'm guessing it's going to be strain dependent and you would have to read your plant.

They can handle low temperature but not frost, the ground has a fairly constant temperature below 4/6"

I'm not familiar with the strain maybe some can handle cold better than others, sativas originate from warmer climates I'd expect indicas to handle it better but idk for sure.

Cheers folks!
Ah yes good call on the temp conversions
Mostly Royal Highness CBD from RQS.
Sweet, yes for some reason I had in my mind that zero degs C is a no-go.
Mmmm one of those ones I guess - keeping an eye on the weather for the next coupla' weeks.

They can handle a light frost no problem. Had a lot of 30 degree nights and all good here. I'd be worried anything below 30 degrees for a sustained period of time.

I hear you could be surprised at how an established outdoor plant can handle some low temps and still be fine. Even some frost - All I got for input.

They can handle very low temps. First frost this yr got down to 25f and they all lived and are still growing.
They have been through 8 frosts total this yr so far. Some mornings there is a sheet of ice on the windshield.

HydroKid239 said:

I hear you could be surprised at how an established outdoor plant can handle some low temps and still be fine. Even some frost - All I got for input.

Click to expand...

Agreed.

To OP: Ive read its the root zone temps that you have to worry about and not so much the ambient air temps.... My 100gal pots hold temps very well even over very cold nights... I forget the temps I had a couple weeks ago but it was the coldest night all year and my pots root zone still stayed at 60-65°F when I checked it at 5am the next morning.

I use these small meat probe thermometers and put one into each pot, you can use the longer ones for compost and stuff but I actually like the shorter ones because you know the temps that are near the wall/outside edges of the pots.




Also, good to note, its the swing of temps that matters too rather than the low/high... So if you can slow down the cooling and heating to be smooth, it would be way better than a quick cold drop for example.

Anything you can do to insulate the rootzone on the very cold nights will help to keep them alive til the next day toward the end of season... So you can use insulation batting, wool blankets, bottles of boiling water filled before bed, emergency space thermal blankets, concrete curing blankets, electric blankets, etc. That sort of thing, just remember, slowly drop temps, and let them slowly rise with the sun heating things up the next morning and they'll be fine.

Wozza!
So they are pretty hardy and don't need our coddling!
Just thinking whether the temps will effect the push now for budding ding dings!
Royal Highness from RQS - been out from seed since April 08 - UK. Between 5deg C nights and 15deg C days for the next couple a weeks.

Totally passed me by that - soil is gonna be a few degs warmer I guess than air ( due to the bio activity etc?).

How long dya reckon - argh - haha I keep pulling bits off and quick drying to get a feel of this (surprising high - kinda "am I high? High" yes I am!)
Long awaited pics! was wondering how you folks get frosty looking pics (lol camera seems to pick up stuff that the eye doesnt)
Finally that 'other' white stuff is residue from diatomaceous earth spraying prior.