Why I stopped watering on a schedule
Watering by the calendar killed more of my plants than anything else. Here is the simple check I use instead.
For my first couple of years with houseplants I watered everything on Sunday morning. It felt organised and responsible. It was also the reason I lost a peace lily, two succulents and a very expensive-looking calathea.
Plants do not drink by the calendar. How fast a pot dries out depends on the light, the temperature, the season, the size of the pot, what it is made of, the type of soil and how big the plant has grown. A schedule ignores all of that.
The finger test
The method I use now is almost embarrassingly simple. I push a finger into the soil up to the second knuckle, about four or five centimetres.
- If it feels dry at that depth, I water.
- If it feels cool and slightly damp, I wait and check again in a day or two.
- If it feels wet, I definitely wait, and I ask myself why it is still wet.
For small pots I sometimes just lift them. A freshly watered pot is surprisingly heavy, and after a while you learn to tell the difference between a dry pot and a wet one by weight alone.
Different plants, different thresholds
Not every plant wants the same thing, so I group mine roughly into three:
- Moisture lovers: most ferns, peace lilies and calatheas. I water when the top couple of centimetres are dry.
- Middle ground: pothos, philodendrons and most leafy tropical plants. I water when about half of the soil depth feels dry.
- Drought-tolerant plants: succulents, cacti, snake plants and ZZ plants. I wait until the pot is dry all the way through, then wait a few more days.
How to water once you do
When I water, I water thoroughly. I pour slowly over the whole surface until water runs out of the drainage holes, then let it drain. After twenty or thirty minutes I tip out anything left in the saucer. A plant sitting in a puddle is the classic route to root rot.
I use water at room temperature. I fill a couple of bottles the night before and leave them on the counter, which also lets them reach the same temperature as the room.
Signs I got it wrong
Overwatering and underwatering can look oddly similar, because in both cases the roots stop delivering water to the leaves. The difference is in the soil.
- Wilting with dry soil means the plant is thirsty. It usually perks up within hours of a good drink.
- Wilting with wet soil, yellowing lower leaves, or a sour smell means the roots are suffocating. Watering more makes it worse.
Seasonal rhythm
Without a schedule, a natural rhythm appears anyway. In summer my ferns need water every three or four days. In winter it is closer to once a week, and my snake plant gets watered perhaps once a month. I did not plan any of that; it simply emerged from checking.
A small notebook
I do keep a notebook, but it records what happened rather than what should happen: the date I watered a plant and anything I noticed. After a season it gives a far better picture of each plant's real needs than any care label. It is also a quiet, pleasant five-minute routine on a weekend morning, which is perhaps what I liked about the Sunday schedule in the first place.