You can find our detailed tips on the Most Common Problems among Succulent Growers and Best Lighting Practices to Succulent Growth here. The light from a north-facing windows is just enough for jade plant growth. Too much sun can make the old lady cactus look sad. They need time for the soil to settle or the cactus mix to fully develop. They grow fastest in the summer, so that's the best time to fertilize them. Pilosocereus can withstand more water than other succulents, cacti and cacti. But, be sure to not overwater them. Succulents can also be called winter growing.