As a general rule, add water when the top half-inch of soil feels dry. When watering, moisten the soil thoroughly, allowing it to soak up the water, and if it does so quickly, add more water until it comes out the drainage holes. Most cacti need to be watered once a week.
So, how long can you go without watering a cactus?
Because it has no leaves, it doesn't give up its water through evaporation as easily as other plants. Its stems are thick with a lot of room for storing water, and with a protective covering that keeps the stored water inside. Some cactus species can go for two years without water.
Do cactus need a lot of sunlight?
Cacti are a type of plant called succulents. They've learned how to compete for survival all over the world. Light Requirements of Cactus Plants will help you break the myth that cacti need lots of sunlight. Learn which cactus plants require hours of natural light and which ones can thrive indoors.
What happens if you give a cactus too much water?
The cactus will hardly grow, or growth will stop and eventually the cactus will die. If the pot is too big and it has too much soil it will hold too much water and this can eventually cause the roots to rot. These pots allow the cacti to breathe better and the soil dries faster inside.