Seasonal Houseplant Care: Winter, Spring, Summer, Autumn

Indoors, the seasons mainly change one thing: light. Less light in autumn and winter means slower growth, and slower growth means plants use less water and need less fertilizer. So in the darker months, move plants towards your brightest windows. Water only after checking that the potting mix has dried as much as that plant likes. Pause feeding or cut it right back. Raise the humidity, and keep leaves off cold glass and away from heaters. In spring, resume feeding and repot plants that need it. In summer, expect pots to dry faster, watch for scorch through glass, and acclimate any plant you move outside gradually.

Why seasons matter indoors: light drives everything else

Extension advice on winter care keeps coming back to light. NDSU Extension explains that houseplants don't need fertilizer in winter "because the reduced light and temperatures result in slower growth." Nebraska Extension notes that light levels drop even further inside the house, and that plants need less fertilizer in low light. University of Maryland Extension links water needs to how much light a plant gets and how warm the room is. The reverse holds in summer: the RHS says plants are more active and dry out faster in warmer weather.

That's why a fixed watering or feeding schedule fails across the year. The same plant in the same pot can need water far less often in December than in July. Check the plant, not the calendar.

Autumn: bring plants in, check for pests, expect some leaf drop

When and how to bring plants indoors

University of Illinois Extension advises bringing houseplants indoors once temperatures fall consistently below 55°F (about 13°C). Purdue Extension likewise notes that houseplants are sensitive to temperatures below 55°F. Ease the change: Illinois Extension suggests moving plants into increasingly shady spots over about a week, then bringing them indoors for a day or two at a time and increasing the time gradually.

Inspect before they come in

Purdue warns that many houseplant pests are picked up while plants are outdoors for the summer. Before you bring plants inside, check the foliage and the potting mix. Flush pots with water to drive out soil insects, and hose pests off the leaves. Keep the returning plants apart from your other houseplants. If you see no pests after 3 to 4 weeks, they can join the rest (Illinois Extension).

Expect yellowing and leaf drop

Light indoors is much lower than outdoors, even compared with outdoor shade, and the drop often causes yellowing leaves and leaf drop (Illinois Extension). UMD Extension gives weeping fig (Ficus benjamina) as an example of a plant that can drop many leaves after the move, and notes that plants need time to adjust. Raising humidity and adding supplemental light can reduce leaf drop, and plants acclimate over time (Illinois Extension). Water needs also fall sharply once plants come back indoors (Nebraska Extension), so re-check before every watering. For specific plants, see can Monstera live outside? and can pothos live outside?.

Winter

Light: move plants to your brightest window

If new growth is thin and spindly, NDSU Extension suggests moving plants to take advantage of brighter light from south-facing windows. Illinois Extension recommends the brightest, sunniest window, typically south- or west-facing in North America, and supplemental lighting if you don't have one. The RHS notes that houseplants benefit from full sunlight when daylight is weak in winter. It also warns against leaving plants behind drawn curtains, where the space can become very cold. Signs of too little light include leggy, stretched growth, leaning towards the light, fading leaf colour and fewer flowers (UMD Extension). For plant-specific advice, see Monstera light requirements, how much light pothos needs and grow light vs sunlight.

Water: check first, and expect to water less often

University of Maryland Extension says the number one reason houseplants die is usually overwatering, and winter makes it easier to do: most plants grow more slowly then, so they use less water. UMD also warns against assuming that a fixed seven-day routine is the right interval, because a plant's needs depend on how much light it gets and how warm the room is. For most plants, let most of the mix dry out before watering: not bone dry, but no wetter than a freshly wrung-out dish towel (UMD).

Feel the mix. Nebraska Extension says most plants need water when the top inch of soil feels dry. Illinois Extension suggests pushing a finger into the mix up to the second knuckle. If it's still moist, watering probably isn't needed yet.
Lift the pot. A pot that feels light may need water (Illinois Extension).
Water thoroughly when you do water. Water until it runs out of the drainage holes, so the whole root ball is moist (NDSU, Nebraska Extension).
Empty saucers. Pour off water left in a saucer after about half an hour (Illinois Extension), and use containers with drainage holes (Nebraska Extension).

Don't assume winter always means much less water. The RHS points out that central heating dries the air, so pots can dry out faster than you expect. That's one more reason to check rather than follow a routine. Plant-specific guides: how to water Monstera, how often to water pothos and overwatered pothos.

Feeding: pause or sharply reduce

Sources agree that winter feeding should be minimal, though they differ on the details. NDSU Extension says houseplants don't need fertilizer in winter, and Illinois Extension advises stopping until spring. The RHS allows feeding in winter but says it should be limited to once a month. Nebraska Extension warns against over-fertilizing in low light. Pausing is the simpler choice for most plants. Plants still growing well under bright light can, at most, be fed lightly, following the product label. See pothos fertilizer and how to fertilize Monstera.

Humidity: heated homes get very dry

NDSU Extension notes that homes can drop to 10–20% relative humidity in winter, while houseplants generally prefer 40–50%. Illinois Extension also gives winter levels as low as 10–20%. Ways to raise humidity around plants:

Group plants together (NDSU, Illinois Extension, RHS).
Stand pots on a tray of pebbles with water, keeping the pot bottom above the water line (NDSU, Illinois Extension).
Move humidity-loving plants to a bathroom or kitchen, provided it has enough light (NDSU, Nebraska Extension).
Run a small humidifier nearby (NDSU, Illinois Extension).

Misting helps less than people expect: Illinois Extension says it raises humidity for only a few minutes. More detail: Monstera humidity and pothos humidity.

Cold glass, draughts and heat sources

NDSU Extension says houseplants favour 65–75°F (about 18–24°C). Illinois Extension gives the same daytime range, with nights about 10°F cooler. Sudden temperature changes can cause leaf drop (NDSU). In practice:

Don't let leaves touch cold windows, and watch windowsill plants as the weather gets colder (NDSU).
Keep plants away from cold draughts from outside doors (NDSU, RHS).
Keep them away from heat sources. The RHS notes that radiators can dry leaves and brown their edges, and Illinois Extension warns against heat vents.

Cacti and succulents are an exception. Nebraska Extension says a cool 55–60°F (about 13–16°C) is ideal for them in winter, but not below 45°F (about 7°C). Lower temperatures encourage sturdy growth and flower buds. See also Monstera temperature.

Spring: resume feeding, repot, re-check light

Feeding: NDSU Extension calls spring and summer the ideal time to fertilize. The RHS recommends feeding during the growing season, roughly March to October in the UK. Restart as new growth appears, and follow the product label.
Repotting: The RHS says plants are best potted on in spring so they can establish over the growing season. A plant that dries out very quickly and makes little growth may be pot-bound. See when to repot a fiddle leaf fig for one example.
Light: Sun gets stronger as spring moves into summer. A plant that needed your sunniest window in January may get too much by June. Too much direct light makes leaves pale, then brown, and they can die (UMD Extension). See pothos sunburn.
Water: As growth picks up, plants use more water. Keep checking the mix rather than switching to a new fixed routine.

Summer: faster drying, scorch and summering outdoors

In summer, higher temperatures make plants more active, so they dry out faster. Strong sunlight can also scorch susceptible plants through glass (RHS), and UMD Extension advises protecting houseplants from excessive direct sun in the summer months. Pull sensitive plants back from hot south- or west-facing glass, or filter the light.

Moving plants outside for summer

Purdue Extension's advice for summering houseplants outdoors:

Wait until temperatures are dependably warm. Houseplants are sensitive below 55°F.
Acclimate gradually, moving plants outdoors for a few hours a day at first. Overexposing tender leaves to strong summer sun causes sunburn.
Give them no more than half a day of morning sun, because afternoon sun is likely to be too strong.
Expect to water more often. Wind dries plants faster, and plants grow faster outdoors, so they need more water and fertilizer (follow the product label). Nebraska Extension also notes that outdoor light, heat and wind greatly increase water use.
Watch for insects, and inspect and clean plants thoroughly before bringing them back in.

For plant-specific advice, see can Monstera live outside? and can pothos live outside?.

Short-day bloomers: poinsettia, kalanchoe and Christmas cactus

Some houseplants flower in response to the season's long nights. UMD Extension names poinsettia, kalanchoe and Christmas cactus as plants whose buds and flowers develop only when days are short: 11 hours of daylight or less. For Christmas cactus, the NC State Extension Plant Toolbox adds:

Lower light in autumn encourages winter blooms, and plants bloom more reliably away from artificial light.
Flowering needs long nights, which NC State gives as uninterrupted nights of at least 13 hours from mid-September until mid-November, with night temperatures of 55–65°F (about 13–18°C).
If the plant doesn't flower, it's probably getting artificial light when it needs darkness.
Buds may drop after sudden changes in temperature or light, or a lack of water.

In practice, keep these plants in a room where the lights aren't switched on in the evening during autumn. Orchids follow their own rhythm. See orchid off-season care and fertilizing orchids in bloom.

A season-by-season checklist

Season	Light	Water	Feeding	Also
Autumn	Acclimate outdoor plants to shade, then move them to bright windows indoors	Needs fall sharply after the move indoors; check before watering	Taper off	Inspect foliage and mix; keep returning plants apart for 3–4 weeks; expect some leaf drop
Winter	Brightest window; open curtains by day; add a grow light if needed	Check the mix; let most of it dry for most plants; water thoroughly and empty saucers	Pause, or at most feed lightly per the label	Raise humidity; keep leaves off cold glass; avoid draughts, radiators and vents
Spring	Watch for stronger sun on plants moved close to windows	Use rises with new growth; keep checking	Resume as growth starts	Repot plants that need it
Summer	Protect from scorch through glass; outdoors, half a day of morning sun at most	Pots dry faster, especially outdoors in wind	Continue during active growth	Acclimate before moving outdoors; watch for insects

Frequently asked questions

Should I fertilize houseplants in winter?

Mostly no. NDSU Extension says houseplants don't need fertilizer in winter because lower light and temperatures slow growth, and Illinois Extension advises stopping until spring. The RHS allows winter feeding but limits it to once a month. Pausing is the simplest approach. If you do feed, follow the product label.

How often should I water houseplants in winter?

There's no reliable fixed interval. University of Maryland Extension warns against assuming a fixed seven-day routine is right, because water needs depend on light and room temperature. Check the potting mix with a finger or by lifting the pot. Water thoroughly once it has dried as much as that plant likes, which for most plants means most of the mix but not all of it.

Why is my plant dropping leaves after I brought it inside?

Light indoors is much lower than outdoors, even compared with shade, and the drop often causes yellowing and leaf drop. Weeping fig is especially prone to it. Give the plant your brightest window, raise humidity and consider a grow light. Plants usually adjust over time.

When should I bring houseplants back indoors?

University of Illinois Extension suggests bringing them in once temperatures fall consistently below 55°F (about 13°C). Acclimate them to shade first, inspect the foliage and potting mix for pests, and keep them apart from other houseplants for 3 to 4 weeks.

Can I put my houseplants outside for the summer?

Many can go outside once temperatures are dependably warm. Purdue Extension notes houseplants are sensitive below 55°F. Acclimate them gradually, starting with a few hours a day, and give them no more than half a day of morning sun to avoid sunburn. Expect to water more often outdoors.

Does misting help houseplants in dry winter air?

Only briefly. Illinois Extension says misting raises humidity for just a few minutes. Grouping plants, using a pebble tray with the pot above the water line, moving humidity-loving plants to a bright bathroom or kitchen, or running a humidifier helps more.