cactus cutting with a knife and taking roots in the air before planting into the pot. cacti propagation photo, callous

air cacti cactus callous care chunk closeup cut cutting desert dry echinocactus echinopsis floral flower form formation gardening green grusonii gymnocalycium hand home house houseplant infected keeping knife nature piece plant planting pot potting prickly propagate propagation reproduction rooting roots round save spines stem succulent take thorns waiting