Cacti may also be planted outdoors in regions with suitable climates. Concern for water conservation in arid regions has led to the promotion of gardens requiring less watering (xeriscaping).°C (16 °F) in cultivation[111]) and may flower better when exposed to a period of cold.[112]. Learn which cactusforcoldclimates might be suitable for your winter landscape. Any cactus, no matter if it is cold hardy or not, needs well-draining soil. Without that, even the cold tolerant varieties will not survive. Beautiful cactusforcoldclimatesCaptivating Combination: Cold-Hardy Cacti and SucculentsCold-Hardy Cactifor the Mountain West Despite these examples, it’s important to acknowledge that cacti from regions with milder winters may suffer damage under intense cold stress. To ensure the well-being of cacti in colderclimates, understanding their temperature requirements and providing appropriate care during... I used a mix of cactuses, succulents, grasses, small drought-tolerant perennials and bulbs. Naturally, none of these are hot-house types. They are all cold hardy down to at least Zone 4. For many of them their natural environment is arid... In addition to its inherent cold-hardiness, the prickly pear cactus can also benefit from some protection measures in extremely coldclimates. One option is to provide a layer of mulch around the base of the cactus. This can help insulate the roots and prevent them from freezing. I live in a climate that requires the selection of cold hardy prickly pears, so I am taking my specific recommendations from two books: Cacti and Succulents forColdClimates by Leo J. Chance and Hardy Succulents by Gwen Moore Kelaidis. Cacti and Succulents forColdClimates - FineGardening. Winter Care For Cactus Plants.Winter Gardening Tips For Cacti. Cold Hardy Cacti And Succulents. Hardy CactusforColdClimates.