How To Water Cactus. Another way to water the cactus is by immersing the pot in a container full of water so the soil can take up water through capillarity. How To Water Cactus Plants Indoors Once houseplant owners know that their Cactus needs watering they are often unsure about how much water the plant requires.
Water must flow through the drain holes and discard the excess after a few minutes. Let the cactus soil dry out in-between watering. How to Water a Cactus Plant.
For indoor potted cacti a dry depth of at least 1½ to 2 is best.
How to Water a Cactus When you water a cactus thoroughly soak the soil with plenty of water until it drips out the bottom. Let the cactus soil dry out in-between watering. Water must flow through the drain holes and discard the excess after a few minutes. You can use several methods to water your cactus plants but the best way is deep watering.