Overwintering cacti outside tips

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anttisepp
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Re: Overwintering cacti outside tips

Post by anttisepp » Sat Sep 05, 2020 6:01 am

Heat mats arent very expencive. I use heating in autumn and spring but all the winter coĺlection spents in a garage on shelves with modest lights at +5 / + 12 C. Only brazileiros move to the house, cause they die at lower temps. Your task is to hold temps below 0, remember that each light frost is a great risk as prolonged subzero temps.
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NaZzAtAzEr
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Re: Overwintering cacti outside tips

Post by NaZzAtAzEr » Tue Sep 15, 2020 12:32 pm

I've had development. My granddad is letting me use his shed. He has one of those cheap small greenhouse things.

The new plan is to put my cacti in there, in low light, wrap it around with insulation and have a heat map below. This means I can maintain minimum 10c temps.

My only worry is that they won't go into dormancy and start to etiolate. Has anyone else done a set up like this?
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habanerocat
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Re: Overwintering cacti outside tips

Post by habanerocat » Wed Sep 16, 2020 11:45 am

NaZzAtAzEr wrote:
Tue Sep 15, 2020 12:32 pm
I've had development. My granddad is letting me use his shed. He has one of those cheap small greenhouse things.

The new plan is to put my cacti in there, in low light, wrap it around with insulation and have a heat map below. This means I can maintain minimum 10c temps.

My only worry is that they won't go into dormancy and start to etiolate. Has anyone else done a set up like this?
Personally I don't think you need to maintain 10C. A couple of the cacti you have listed at 10C will go much closer to zero. Other 10Cs listed I'm not familiar with. Perhaps just bring those in doors and maintain the shed just above zero.
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Re: Overwintering cacti outside tips

Post by NaZzAtAzEr » Sun Sep 27, 2020 9:08 pm

I have moved my cacti to my granddads and wrapped them in wool, fleece and a blanket. Hopefully they survive on to next year :)
At the moment they aren't getting any light, and should hopefully dry out fully soon. They have a heat mat a shelf below and I am going to buy a thermostat to make sure it doesn't dip below freezing. Fingers crossed!
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Re: Overwintering cacti outside tips

Post by colser » Sun Sep 27, 2020 10:25 pm

good luck with the overwintering :smile:
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Re: Overwintering cacti outside tips

Post by Aiko » Sun Sep 27, 2020 10:45 pm

NaZzAtAzEr wrote:
Tue Sep 15, 2020 12:32 pm
The new plan is to put my cacti in there, in low light, wrap it around with insulation and have a heat map below. This means I can maintain minimum 10c temps.
Unless you have heat lovers like Melocactus, Discocactus and things like that, I would aim for 0C. Most cacti can easily take freezing temperatures if they are dry. Up to -3C on a regular basis is not problem, colder should also not harm a lot if it happens not too frequently and to severely. So 0C is a very safe target for you.

10C is way too high. It will only cost you a lot of energy, there is an increase in fire risk and the plants might not get a proper dormancy (which might also result in lack of flowering during next growing season). And keeping them nice and cold makes it easier for you to ventilate well. Give your plants as much as fresh air as you can to toughen them up and avoid high humidity (just open up windows or the door and only close it when it starts to freeze). Ventilating will be a hard thing to do during winter if you want to keep the temperature at 10C at the same time but so much easier closer to 0C...

Cold (preferably frost free), dry soil and fresh air are the three key winter survival ingredients for about 95% of the cacti. Light would be nice too, but not essential.
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