6B Cacti?


Carnivorous Plant Addict
Does anyone know of any Cacti that can survive 6B winters besides Opuntia species?
Google has some confusing pages.
Natural Themes Native Plant Nursery in Stockdale, ON has a cactus garden. I'll try to remember to take a picture next time I'm there with the names of the plants. I think one of them was a prickly pear cactus? Though I'm not 100% sure on that.


Staff member
Cylindropuntia imbricata, Tree Cholla is hardy down to -28 apparently, probably as long as the soil is dry and not a block of ice. Not saying much, people including myself grow it outdoors year round here in Victoria. It’s so hardy that it’s considered a noxious weed in some countries. Lloyd would love it’s glochids!

Not mine, mines still small about the size of a finger.

Lloyd Gordon

Cactus micrografter newbie.
Staff member
The hardy Opuntias you see in garden stores are hardy in Toronto. They don't mind if they're covered in salty snow or if the roots are moist and the soil is frozen solid. The flowers are attractive. The glochids are fierce and not a good idea if kids or dogs are around. And you will get glochids on your hands, not fun. Hot, full sun is good.
For the other ones, make sure the soil is rocky/raised/very well drained. Bright sun with some protection from excessive heat and light shaded by other plants such as grasses. Cacti can burn, especially when young. Wet, soggy, constantly moist soil will rot the roots.