Cactus

How your pot, light and size change it

Every 24 days is the starting point. Here’s how each part of your setup moves it on its own — the free schedule tool combines all of them for your plant.

How pot, light and size change how often to water Cactus

Factor	Setup	Water
Pot	Terracotta	every 21 days
	Plastic	every 24 days
	Glazed ceramic	every 26 days
Light	Bright	every 21 days
	Medium	every 24 days
	Low	every 27 days
Plant size	Small	every 22 days
	Medium	every 24 days
	Large	every 26 days

How much water to give

Roughly 150–250 ml for a small pot, 250–500 ml for a medium one and 500–750 ml for a large plant. Pour slowly until a little runs out of the drainage hole, then tip away whatever collects in the saucer — a Cactus sitting in water is the quickest way to rot its roots.

Watering Cactus through the seasons

In spring and summer, growth picks up and warm days pull moisture from the pot faster. In a hot, dry spell our schedule tightens to about every 17 days. In autumn and winter the plant slows down and the soil stays damp for longer, so in cool, damp weather the schedule stretches to about every 32 days. Whatever the season, check the soil before you pour — the date is a reminder, the soil has the final say.

Signs of overwatering and underwatering

A Cactus stores water in its leaves and stems, so too much water is by far the more common problem. Signs of overwatering: leaves or stems turning soft, translucent or mushy, darkening at the base, and soil that stays damp for days. Signs of underwatering: wrinkled, shrivelled or deflated-looking leaves or stems. A thirsty Cactus plumps back up within a few days of a good soak; a rotting one often can’t be saved, so when in doubt, wait.

Cactus care guide

Extremely drought-tolerant succulents with spines. Require bright light; full sun is ideal. Water deeply when soil is completely dry, typically every 3-4 weeks. Require well-draining cactus soil. Prefers 50-80°F and low humidity. Minimal fertilizing. Dormant in winter; reduce water significantly. Propagate via cuttings or seed. Virtually pest-free.

Cactus watering FAQ

How often should I water my Cactus?

Water your Cactus about every 24 days. Let the soil dry out between waterings. Terracotta pots, bright light and small plants dry out faster; glazed pots, low light and larger plants hold water for longer.

Should Cactus dry out between waterings?

Yes. Let the soil dry out between waterings. Push a finger right down into the pot before you pour, past the top couple of inches. Dry on top means very little on a plant like this — it would far rather be too dry than too wet. Lifting the pot works too: if it still has some weight to it, there’s water down there.

How much water does a Cactus need?

Roughly 150–250 ml for a small pot, 250–500 ml for a medium one and 500–750 ml for a large plant. Pour slowly until a little runs out of the drainage hole, then tip away whatever collects in the saucer — a Cactus sitting in water is the quickest way to rot its roots.

Should I water my Cactus less in winter?

Usually, yes. Growth slows and the soil stays damp for longer, so in cool, damp weather the interval stretches to about every 32 days. Check the soil rather than sticking rigidly to the calendar.

Does a terracotta pot change how often I water a Cactus?

Yes. Terracotta breathes and dries faster, so a Cactus in terracotta needs water about every 21 days, compared with every 24 days in plastic and every 26 days in a glazed pot.

How do I know when my Cactus needs water?

Push a finger right down into the pot before you pour, past the top couple of inches. Dry on top means very little on a plant like this — it would far rather be too dry than too wet. Lifting the pot works too: if it still has some weight to it, there’s water down there.