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Some of mine

Discuss hardy cacti grown outside all year.

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Postby Ralf » Sat Feb 13, 2010 9:46 pm

Yes indeed it's right, Daiv. Double isolated with bubble wrap from inside and outside.
Mainly I do use a propane heater and as backup there is an electrical fan heater.
Temperature inside is between 5 to 8°C (41-46F) at night. On day it's somewhat higher.
The third pic is also a puzzle pic. Where are the hotbeds?
Only when the last tree has died, the last river has been poisoned and the last fish has been caught will we realize that we cannot eat money.
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Postby Ralf » Mon Feb 15, 2010 9:45 am

I'll do show you the hotbeds. The plants inside needs light, so I've do remove the snow and opens the windows for fresh air on sunny days.

Image

Let's have a look inside there are some several
Escobaria, Echinocereus and Opuntia
Image

inside the other one some several Cylindropuntia and Opuntia
Image

The lowest temperature inside was -10°C (14F) since December. The plants looks therefor very vital and healthy.
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Postby daiv » Mon Feb 15, 2010 7:02 pm

Nice. What you call a "hot bed", I have heard called a "cold frame". Your term makes more sense to me.

How about a look inside the greenhouse?
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Postby TimN » Tue Feb 16, 2010 12:18 am

daiv wrote:Nice. What you call a "hot bed", I have heard called a "cold frame". Your term makes more sense to me.


"Cold frame" aways seemed sort of obtuse to me.

Awesome plants and pictures Ralf! TFS.
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Postby iann » Tue Feb 16, 2010 12:26 am

A hot bed is different from a cold frame. It is heated (duhh!). Traditionally the heat is provided by a layer of composting material such as manure, in which the plants can then be grown directly. Hence the cold frame is a frame which is not heated.
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Postby daiv » Tue Feb 16, 2010 3:03 am

After all those years, it finally makes sense!

Now Ian, do you know this because at some point you were wondering about this too?
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Postby Ralf » Tue Feb 16, 2010 4:06 pm

Aha, now I'm a little step more clever, thanks iann. :-)
Now in the following I'll use the term "cold frame".
It's a lot of work to correcting my site.

daiv wrote:How about a look inside the greenhouse?


Sure, of course. But I'll do this in another topic.

@TimN
What do you mean with "TFS"? I'm not really good in your language. :-(
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Postby daiv » Tue Feb 16, 2010 5:20 pm

Ralf wrote:What do you mean with "TFS"? I'm not really good in your language. :-(


Short for "Thanks For Sharing".
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Postby Tom2643 » Sat Feb 20, 2010 4:07 am

Very nice! You've got some plants I wish I could grow outside!
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Postby Ralf » Sun Feb 21, 2010 5:44 pm

Why don't you do it? It's also in pots and bowls possible.
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Re: Some of mine

Postby PixMe » Sat Apr 05, 2014 8:45 am

I don't know if this topic is still hot. However, I am a beginner and found a grower in Germany who is specialised on outdoor cacti growing here.
Homepage (in German): http://winter-kaktus.de
I translated the most important facts:
The following cacti can be grown outdoors in Germany (up to -20° Celsius, some of them up to -30° Celsius; 500-700ml rainfall, no rainfall protection):
  • Echinocereus triglochidiatus − coccineus group: (monacanthus, gonacanthus); mojavensis, v. inermis; coccineus, v. paucispinus, v. „minor“.
  • Echinocereus caespitosus − baileyi group: „reichenbachii“, caespitosus, perbellus, baileyi, v. albis­pinus
  • Echinocereus engelmannii − fendleri group: some fendleri-forms and engelmannii v. variegatus
  • Echinocereus x-roetteri, x-lloydii group: x-roetteri, x-lloydii, x-rosei, x-guerneyi, x-octacanthus
  • Escobaria vivipara group: vivipara, neomexicana, arizonica, kaiba­bensis, radiosa
  • Escobaria sneedii − orcuttii group: sneedii, leei, orcuttii, v. königii, v. macraxima, villardii, guadalupensis, sandbergi
  • Escobaria missouriensis group: missouriensis, ssp. caespitosa
  • Pediocactus simpsonii (note that they might need rain shelter)
  • Platyopuntia with big flat branches: engelmannii, phaeacantha, cymochila, compressa, humifusa, erinacea, macrorhiza
  • Opuntia fragilis group: most of them
  • Cylindropuntia imbricata
  • Maihuenia: poeppigii, valentinii, patagonica (note that not all clones are hardy)
I took this information from here: http://winter-kaktus.de/index.php?option=com_content&task=view&id=39&Itemid=108
There you can also find some cacti which are less hardy (up to -15° Celsius) at the end of the page.

Note that I did not include the hybrids.

Please excuse me if I didn't write the names properly since I am a beginner and just tried to translate the info from the URL above ;) But maybe someone might find this useful.

I started with a Cylindropuntia imbricata, an Echinocereus cocchineus and some succulents. Let's see if it works...
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Re: Some of mine

Postby hoteidoc » Mon Apr 07, 2014 9:37 pm

PixMe - Read up ALL posts & pics of Ralf's -- he's as good as they come with cold-hardy's in Germany! =D>
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