You don't need to give up your fire stick succulents poisonous or your dog, but you may find that they are not compatible. The leaves are said to have an almost gritty texture to them. White flowers with green venation appear midsummer through the early fall. In a well-draining soil, sow the seeds in spring/fall. Watering: When the growth is at its peak, water H. wittebergensis well. Wait until the soil dries before watering again. To make the soil wettable, I spray it with a sprayer. Water only when the soil has dried.