CactiGuide.comcactus forum
cactus home cactus identification cactus tech care for your cactus learn more about cactus
cactus nomenclature where cactus grow cactus forum cacti pests and diseases why I grow cactus

Can they take -23 °C at night for a few days?

Discuss hardy cacti grown outside all year.

Moderators: hob, ihc6480

Re: Can they take -23 °C at night for a few days?

Postby FRANCKM » Thu Mar 29, 2012 9:25 pm

Very interesting post. Thanks for your 'crash test' Exotica. Gonna help community from the cold...

Franck
Visit my garden website > http://exoticatolosa.e-monsite.com/
User avatar
FRANCKM
 
Posts: 49
Joined: Fri Mar 12, 2010 12:35 am
Location: Toulouse - SOUTHERN FRANCE (USDA 8)

Re: Can they take -23 °C at night for a few days?

Postby hoteidoc » Thu Mar 29, 2012 10:08 pm

Exotica - Again, thanks for the "fearlessness" of your experiment! =D> I think between RayC, Andy_CT & myself, we must have pushed the limits of the soggiest winter w/o freezing! :( We all had record amounts of rain with long periods of gray. Incredibly I lost no plants among several Echinocer spp., Escob. & Fall-planted Opuntia pads! While following your on-going experiment, I had enough "faith" to H20 the Pedio. simp. v. minor a couple of days in Feb. when the glass porch got up to 50f! They're blossoming :D
Peter
Once bitten by the cactus collecting/growing bug, there is no known cure!
There's no 12 step programme for Cactaholics...so I shall just have to get some more!!
User avatar
hoteidoc
 
Posts: 2131
Joined: Tue Jan 18, 2011 9:56 pm
Location: Finger Lakes region, NY Zone 6b

Re: Can they take -23 °C at night for a few days?

Postby exotica » Fri Apr 06, 2012 9:18 pm

Thank you all for the replies!

Well, there are a few glitches in this year's approach, which I have yet to figure out.

I wrote I had them continuously wet for over a month. Most responded with the desired inflation and flower buds, but some gave me worries.

1. I guess I've been just on the edge with the amount of water I've been giving.
06.04.2012 paradinei SB502
Image
At start it took up some water, started forming buds, but suddenly between week 3 and 4 after the first watering, began to shrink. It stood shrunken for a while with no signs of both body and buds growth, and my concerns were confirmed. It has lost part of the main root to rot. This plant is in the lowest part of the tray and probably got too wet. The picture above is after it was treated with 3% bleach solution and fungicide. Re-potted already and out again.

2. I have no clue about this one.
06.04.2012 fickeiseniorum RP145
Image
The only one to continue shrinking without any response to the watering. I suspected root problems, but it showed nice and healthy roots, so I still don't know what is its problem (side-by-side peeblesianus has no problems at all). Anyway it passed the same treatment as paradinei, re-potted already and out again.

3. My 2 simpsonii decided not to flower, but showed vigorous growth instead. AFAIK, these are the easiest of the group and I wonder what I'm missing to make them develop and keep their bids and flower… :?

Next I'll be posting the condition of my garden Opuntia-s, but time to go to bed now…
Cheers, Andrey
User avatar
exotica
 
Posts: 49
Joined: Fri Jan 06, 2012 10:01 am
Location: Sofia, Bulgaria

Re: Can they take -23 °C at night for a few days?

Postby exotica » Mon Apr 09, 2012 9:06 pm

Here they are.

29.03.2012 Corynopuntia clavata
Image
No problems at all.

29.03.2012 Opuntia engelmannii var. engelmannii
Image
Damaged, but not severely. I hope it will recover and grow nicely.

29.03.2012 Opuntia engelmannii var. lindheimerii
Image
Badly damaged. A whole segment fallen off completely dessicated. The other segments have partial damages. Still the base segment looks alive and I hope it will come back with new segments.

29.03.2012 Opuntia aureispina
Image
The first to stand up. Nice, no damage at all.

29.03.2012 Opuntia fragilis ×"Wenatchee"
Image
No problems at all.

29.03.2012 Opuntia erinacea var. utahiensis
Image
The second one to stand up. Nice and problem free.

29.03.2012 Opuntia winteriana
Image
Still laying and shrunken, but no visible damages.

29.03.2012 Opuntia humifusa
Image
Still laying and shrunken, but no visible damages.

29.03.2012 Opuntia ×?
Image
This is a less than a year old volunteer of unknown origin. Either winteriana's or erinacea var. utahiensis's offspring, father unknown. I didn't expect to see it alive after the winter, but here it is!

And some of the best performing burst-growers with more recent photos:

07.04.2012 Pediocactus simpsonii var. simpsonii RP110
Image

08.04.2012 Pediocactus knowltonii SB304
Image

08.04.2012 Sclerocactus mesae-verdae SB303
Image
Cheers, Andrey
User avatar
exotica
 
Posts: 49
Joined: Fri Jan 06, 2012 10:01 am
Location: Sofia, Bulgaria

Re: Can they take -23 °C at night for a few days?

Postby peterb » Mon Apr 09, 2012 9:45 pm

Fantastic information, thanks for all of these informative posts.

peterb
Zone 9
peterb
 
Posts: 9473
Joined: Mon Aug 07, 2006 4:19 am
Location: Tempe, Arizona, USA

Previous

Return to Outdoor Cacti

Who is online

Users browsing this forum: No registered users and 1 guest