Oh really?? That's AWESOME! Now you got me interested. I might try to grow one in the future, just because if the plant gets the winter rest, it's almost guaranteed bloom. What do you think, would the opuntia polyacantha survive about 5-6months in frost, max 7? Normally the winter starts here at some point of November and the spring starts in the end of Aril but there has been and there will be annual changes with the winter. There has been even Junes when we got snow.7george wrote: ↑Sun Jul 08, 2018 5:01 pm Opuntias are worth to keep in collection outdoors only. Thirst they are bulky and second need all the sun your sky provides. These I have (polacantha, fragilis, some other hybrids and cultivars) possess almost limitless cold-hardiness (- 35 C for sure) and can be kept in pots in winter cause their roots ate cold-hardy as well. Ground here freezes 0.5 m deep in winter anyway. Our summer is maybe like yours, average maximums 23°, minimums ~10° and unbelievable 18 - 32° during the heat waves. But lot of sunny clear days at my 1025 m elevation.
You climate sounds just like ours.
Unpredictable would be a word for it. And the weather can change in a blink of an eye, like you are 100% sure that the sky was clear 30 minutes ago but is now full of clouds and soon it starts to rain. Does that happen in Calgary too?
