How often to water cactus

PotPal's default range for cactus

Summer: every 7–10 days
Spring and autumn: every 20 days
Winter: every 30–60 days

These ranges are PotPal's default starting point for this species by season; once the plant is in the app, PotPal adjusts them for light, pot, soil mix and local weather. They are PotPal's convention, not a general gardening rule, and checking the soil always comes first.

Light

Needs strong light; direct sun is best.

The most common way it gets killed

Watering on a summer schedule in winter; it needs almost no water then.

How to check

Push a finger two knuckles into the gritty mix; water only when it's completely dry, and barely at all in winter.

The general rule of checking the soil rather than the calendar comes from UConn Home and Garden Education Center, Houseplant Watering Recommendations (homegarden.cahnr.uconn.edu), checked 2026-10-13.

Let PotPal keep track

PotPal works out a watering window for each plant you add and sends a local reminder, and you can tap Not dry yet when the soil is still damp. Adopting cactus straight from the in-app plant atlas is coming with PotPal 1.4.0, with the range above as its starting point.

Frequently asked questions

How often should I water cactus in summer and in winter?

PotPal's default is every 7–10 days in summer and every 30–60 days in winter, and every 20 days in spring and autumn. That is PotPal's own starting range, not a general rule.

The reminder came but the soil is not dry yet. What should I do?

Wait and check again. Tap Not dry yet in PotPal to push the reminder back by 2, 4 or 7 days. It does not count as a watering.