Hibiscus (Seed), Rose of Sharon PDX Urban Gardens Toxic for cats? : r succulents What does callusing a succulent cutting mean? A cutting is callused when cell tissues develop where the succulent was cut. It's sort of like a scab. When the cut is callused Love succulents? Join one of Southern California's many clubs LAist Frontiers Costunolide Influences Germ Tube Orientation in Sunflower Broomrape A First Step Toward Understanding Chemotropism 15 Reasons Your Succulents Are Dying & How to Revive Them