I want to know how to grow a cactus. What type of weather do they like? It depends on what kind of cactus you are planting. How often do they need water? Not to much or it will rot. Where is the best place to grow a cactus? The best place to grow a cactus is in dry deserts. How much sunlight do they need? A lot of sun. What kind of soil dose it need? It has to be thick soil.