Overwatering or underwatering? The signs that never lie
Watering kills more houseplants than anything else, and most often through too much attention. The problem: too much water and too little give similar signs. Here's how to stop getting it wrong.
Updated on 9 October 2026
In short
- Before watering, push a finger into the soil: only water if the top inch or so (2–3 cm) is dry.
- For succulents and cacti, wait until all the soil is dry.
- Water thoroughly, until water runs out of the drainage hole, then empty the saucer.
- A wilting plant can have too much water or too little: the soil tells you which.
- In winter, most plants drink much less: in our care guides, watering is on average almost twice as far apart.
Reading the signs
Too much water and too little look alike at first glance: in both cases, the plant wilts and yellows. The difference is in the soil and in the texture of the leaves.
| Too much water | Not enough water | |
|---|---|---|
| The soil | Still damp several days after watering, sometimes a musty smell | Dry, hard, pulling away from the side of the pot |
| The leaves | Yellow and soft, often the bottom ones | Yellow then brown and crispy, starting at the edges |
| The plant | Wilts even though the soil is wet | Wilts, then perks up a few hours after watering |
| The stem | Base dark or mushy | Floppy, but firm |
| Other clues | Fungus gnats, white mould on the soil | Pot feels very light when you lift it |
When in doubt, remember that overwatering is by far the most common, and the most serious: a thirsty plant recovers in an hour, rotten roots much less easily.
Three ways to know if it's thirsty
- Your finger: push it an inch or so (2–3 cm) into the soil. Dry: water. Cool or damp: wait.
- The weight of the pot: lift it just after watering, then now and again. With practice, you'll feel straight away when it's light.
- A wooden skewer: for large pots, push in a skewer (as you would to test a cake). If it comes out clean and dry, it's time.
Watering properly
Watering a little every day is the worst habit: the bottom of the pot stays dry while the top never dries out. It's better to water rarely, but thoroughly:
- pour room-temperature water slowly over the whole surface of the soil;
- stop when water starts running out of the drainage hole;
- after fifteen minutes, empty the saucer or outer pot: no houseplant likes standing in water.
Some plants don't like their leaves or crown getting wet, such as the cyclamen or the African violet. Water them from below: let the pot soak for 20 minutes in a saucer of water, then throw away what hasn't been absorbed.
Why there's no universal schedule
"Water once a week" means nothing without knowing where the plant lives. It drinks more in a bright room than in a dark corner, more in summer than in winter, more in a terracotta pot, which breathes, than in a plastic one, and more if it's large in a small pot. Here's the rhythm for a few well-known plants, in a room with their favourite light:
| Plant | Spring and summer | Autumn and winter |
|---|---|---|
| Monstera | every 7 days | every 2 weeks |
| Pothos | every 7 days | every 12 days |
| Peace lily | every 5 days | every 8 days |
| Snake plant | every 2 weeks | every 30 days |
| ZZ plant | every 2 weeks | every 4 weeks |
| Orchid | every 7 days | every 10 days |
Each plant care guide gives this rhythm, and the watering calculator adapts it to your room's light and the season. It's also what the Xyléa app does, plant by plant.
Succulents and cacti
Echeverias, aloe vera and cacti store water in their leaves and stems. Water them generously, then let the soil dry out completely before watering again. In winter, once a month is often enough, and some cacti need none at all. Soft, translucent leaves are a sign of too much water; wrinkled leaves, of real thirst.
Fixing a mistake
A thirsty plant recovers if you soak the pot for 20 to 30 minutes in a bowl of water. A drowned plant needs more care: stop watering, empty the outer pot, and sometimes unpot it to cut off rotten roots. It's all explained in the yellow leaves guide.
This advice is for houseplants in a temperate climate. Every home is different: trust your plant too, and the soil under your finger.