Potting Mix And Planting Craft a well-draining potting mix for your Christmas cactus. A blend of peat moss, perlite, and sand serves well. Ensure the potting mix boasts a slightly acidic pH level, ranging from 5.5 to 6.5. Plant the Christmas cactus in the container, allocating ample space for root expansion. Avoid excessive planting depth, as the cactus thrives with shallow embedding.