I use transparent PVC on a wooden frame as rain protection, from begin October to mid March. Very important is also a good drainage.StrUktO wrote:what do you do to shelter them if needed?
More info are here
Look at the mapStrUktO wrote:and where in germany do you live?
Opuntia rutila
Opuntia fragilis "Freiberg"
It's probably possible but the winter in NV is much more dryer than in Germany. I'd think the low temperatures are not the problem. The to high humidity is more dangerous for the plants. It rises to over 90% for many weeks. The plants could get mold.Charles wrote:You and I have a lot in common. I grow hardy cactus in Reno, NV USA. What grows here grows in Germany, I think.