Gadenin日本語Get the appCheck the pot, never the calendar
A ficus in a warm bright room in summer may want water twice a week. The same plant in the same pot in a cool room in winter may want it once a month. Any advice of the form water it every seven days will be wrong for most of the year, and watering to a fixed interval is the commonest way people kill a rubber plant.
The rule that does work: push a finger into the compost to the second knuckle. If it comes out dry and loose, water. If it is cool and damp, wait and check again in two days. Do this every time and the seasonal variation takes care of itself.
| Situation | How fast the pot dries | Practical interval |
|---|---|---|
| Bright window, warm room, summer | Fast | Every four to seven days |
| Bright window, cool room, winter | Slow | Every two to four weeks |
| Large plastic pot, moderate light | Very slow | Check weekly, water far less often |
| Terracotta, small pot, heated room | Fast and uneven | Check every three days |
Buy nothing to do this. Lifting the pot works just as well: learn the weight right after watering, and water again when it feels clearly lighter.
Water thoroughly, then let it drain
Little and often is worse than nothing. A splash of water wets the top inch and leaves the roots in the lower two thirds of the pot permanently dry, which is why a plant can be watered every week and still show thirst.
- Water until it runs out of the bottom Pour slowly and evenly over the whole surface until water appears at the drainage holes. That is the only way to be sure the entire rootball is wet.
- Empty the saucer within the hour Water standing under the pot keeps the base of the compost wet permanently. This is where root rot and fungus gnats begin, and it matters most in winter.
- Take it out of any decorative outer pot If you water a plant sitting inside a cachepot you never see the water pooling in the bottom. Lift it out, water it, let it finish draining, then put it back.
- Use tepid water Cold water straight from the tap shocks warm roots, and a weeping fig will drop leaves over it. Let a can stand in the room overnight.
Overwatering and thirst look almost identical
Both make leaves yellow and fall, which is why so many people respond to overwatering by watering more. The compost, not the leaf, tells you which one you have. Feel the pot before you interpret any symptom.
| Symptom | If the compost is wet | If the compost is dry |
|---|---|---|
| Lower leaves yellow and drop | Overwatered. Stop and let it dry out | Underwatered, or simply old age |
| Leaves limp and hanging | Roots damaged. Check them | Thirsty. Water thoroughly |
| Brown crisp leaf edges | Root damage limiting uptake | Dry air or a missed watering |
| Brown soft patches in the leaf | Overwatering or cold | Sunburn, if it is in direct sun |
| Sour smell from the compost | Rot. Repot into fresh mix now | Not applicable |
A thirsty ficus recovers within a day of a thorough watering. If it has not picked up by the following day, the problem is the roots and more water will make it worse.
Cut right back through the cold months
Growth slows or stops when the room cools, and a plant that is not growing barely uses water. Continuing a summer routine into winter is the single most common cause of losing a mature ficus, because the compost never dries and the roots suffocate.
Reduce how often you water, not how much. When you do water, still water thoroughly until it runs out. Half-watering a plant all winter simply produces a permanently damp upper layer and a dry, dead root zone underneath.
- Water in the morning Wet compost meeting a cold night is what rots roots. Watering in the morning gives the pot the whole day to drain and warm.
- Stretch the interval gradually As the light weakens through autumn, add a few days each time rather than making one abrupt change. The plant is winding down over weeks, not overnight.
- Below 55F, sort the position first If the room drops below 55F (13C), move the plant somewhere warmer before you think about the watering. Watering a cold plant accelerates rot.
Feeding is part of watering
A ficus is not a hungry plant, and the damage from overfeeding looks like watering trouble: brown leaf edges, a white crust on the compost surface and leaves dropping for no visible reason. Feed only while it is actively growing.
A balanced liquid houseplant feed at half the stated strength, every third or fourth watering through the warm half of the year, is plenty. Stop entirely once new leaves stop appearing, and do not resume until you see one open.
If you suspect a build-up of salts, water the pot heavily two or three times with plain water and let it all drain away. This flushes the compost and often stops the leaf-edge browning within a few weeks.
Keeping a record that is worth having
Watering problems develop over months, and memory is not reliable across that distance. Note the date each time you water, roughly how long the pot took to dry, and any leaves that fell that week.
After one full year you have something genuinely useful: your own intervals for your own room in each season, and a clear record of when the plant shed leaves and what changed just before it. That is far more accurate than any general figure, including the ones on this page.