10/25/2026
Your desert cactus is built for a drought - in its natural habitat it would get one, but in your home, you need to hack it!
In nature, many desert cacti experience seasonal periods of very little rainfall. And when we grow them as houseplants, we need to account for their winter rest period instead of watering them the same way we do all summer.
Give your cactus a good, thorough watering in October, allowing the excess water to drain completely. Then, let it rest through the winter with little to no water until spring, when the days get longer, sunlight increases, and the plant starts actively growing again.
Many desert cacti slow down or go dormant during the cooler, darker months. If you continue watering them like you do in summer, the soil can stay wet for too long, increasing the risk of root rot.
Keep your cactus in a bright spot, make sure it has excellent drainage, and resist the urge to water it just because you’re watering all your other houseplants.
Keep in mind, euphorbia are not cacti! Some species look almost identical to desert cacti, but they belong to a completely different plant family. Their winter watering needs depend on the species and growing conditions. For many common indoor euphorbia, you should reduce watering in winter but still check the soil and water when it has dried out and the plant needs it. Don’t automatically leave every euphorbia completely dry all winter.
Knowing what kind of plant you have makes a huge difference in getting winter plant care right.
Save this for your fall cactus care routine, and remember: less light means less growth, and less growth often means less water - especially for cacti!