Gadenin日本語Get the appThe year at a glance
A spider plant grows hard through the warm half of the year and effectively pauses through the cold half. Everything that stresses it, repotting, dividing, rooting plantlets and cutting back, belongs in the growing half, and almost every winter loss comes from treating the plant as though it were still growing.
| Season | Watering | Feeding | Jobs |
|---|---|---|---|
| Spring | Every five to seven days | Half strength monthly once growth starts | Repot, divide, flush the pot, tidy old leaves |
| Summer | Every two to five days | Half strength monthly, skip in real heat | Root plantlets, watch for mites, move out of sun |
| Autumn | Every seven to ten days | Stop by mid autumn | Bring outdoor plants in, move back to the window |
| Winter | Every two to three weeks | None at all | Hold it: no repotting, no feeding, no cutting back |
The seasons here are about temperature and daylight, not dates. Read spring as the point when your room warms past about 59F (15C) and new leaves start appearing, whichever hemisphere you are in.
Spring is when the work happens
As the room warms and the days lengthen, the plant starts moving and can recover from disturbance. Repotting, dividing and any hard tidying belong here, and a plant repotted in spring is established again within a month.
Start feeding only once you can see new leaves emerging from the center, not before. Feeding a plant that has not restarted simply loads salts into the compost, and those salts come back as brown tips in a month or two. This is also the moment to flush the pot through at a sink and clear last year's build up.
- Assess the pot first Check whether the rootball has lifted above the rim and whether roots are out of the drainage holes. Repot now if so, because doing it in autumn instead means cut roots sitting wet through winter.
- Clear the old leaves Pull or cut away leaves that yellowed over winter, taking them right off at the crown. Leaving stubs invites rot in the center of the plant.
- Move it back towards the light The winter sun was weak and the plant may have been standing very close to the glass. As the sun strengthens, watch for the first signs of bleaching and move it back or filter the light.
Summer: fastest growth, and the plantlets
Water use peaks now and a pot bound plant in a hanging basket can want water every other day. At the same time the risk of scorch is at its highest, so move the plant back from strong glass or to a less intense aspect for the season.
Runners and plantlets appear from midsummer onwards on a mature, well lit plant. This is the season to root them, while the room is warm and the plantlets are well developed. Keep checking leaf undersides too: spider mites build up fastest in hot dry air, and a fortnightly look catches them before webbing appears.
A spider plant can go outside in summer shade once nights stay above 50F (10C), but harden it off over two weeks starting in deep shade. Bring it back in before autumn nights fall below that, and wash the leaf undersides and the base of the pot first.
Do not leave the autumn switch too late
As the light weakens, the position that was right in summer becomes too dark, so move the plant back towards the window. At the same time start stretching the watering interval, because a plant that is slowing down uses far less than it did.
Stop feeding well before the temperature drops. Anything left in the compost when growth stops stays there through winter and damages roots. Repotting now is a mistake for the same reason: cut root surfaces need warmth to heal and get none.
Overwintering
The winter job is to hold the plant, not to grow it. Water every two or three weeks on a mild morning with water at room temperature, do not feed at all, do not repot and do not cut it back. Keep it off cold glass overnight and out of the direct draft of a heater during the day.
One or two older leaves yellowing and dropping over winter is normal turnover. A succession of leaves going soft and yellow from the center is root rot, and the cause is nearly always watering on a summer schedule into compost that never dries.
| Winter condition | Temperature | Watering | Main risk |
|---|---|---|---|
| Heated living room | Above 64F (18C) | Every ten to fourteen days | Dry air browning the leaf tips |
| Average unheated room | 50 to 59F (10 to 15C) | Every two to three weeks | Compost staying wet too long |
| Cold room or porch | 41 to 50F (5 to 10C) | Once a month, sparingly | Cold damage, keep it barely damp |
| Below 41F (5C) | Too cold | Move it before you water | Leaves collapse and do not recover |
The commonest winter mistake is feeding to make up for slow growth. Fertilizer on a plant that is not growing only burns roots and shows up as brown tips in spring. Wait for new leaves.
What to write down
One season of notes makes the next year far easier, because this plant is driven by your particular room rather than by any general calendar. Keep it brief: a few dates are worth more than a description.
Record the date you repotted and what size pot it went into, the date you restarted and stopped feeding, when the first runner appeared and where the plant was standing at the time, and the date any brown tips or pests first showed up. The pattern that emerges tells you when to act next year rather than when to react.