Houseplant winter care — the complete guide

Winter is the season that catches most houseplant owners out. Nothing about the plant changes visibly — but the room around it does. Days get short and the sun sits low, central heating dries the air, windowsills turn cold at night, and growth quietly slows to a crawl. The care routine that kept everything thriving in July becomes the fastest way to rot a plant in December. The good news: the fixes are small and there are only a handful of them. This guide ties the whole winter cluster together, summarising each adjustment and linking to the dedicated deep-dive for anything you want to explore further.

Set up Growli for the season: Add your plants to Growli and it recalculates each watering reminder for the darker months — so you're prompted less often, tuned to your light, your room temperature, and the plant in front of you.

What actually changes in winter

Four things shift at once, and every winter care rule flows from them:

• Less light. Days are shorter and the sun is weaker and lower in the sky, so even a bright room delivers a fraction of the light energy it did in summer.
• Dry, heated air. Central heating pulls the relative humidity in a room down sharply — often well below the 40–50% that many tropical foliage plants prefer.
• Cooler nights and cold surfaces. Window glass, sills and exterior walls get cold after dark, and the air right next to them can be many degrees colder than the middle of the room.
• Slowed growth. With less light and cooler temperatures, most plants stop putting out new leaves and settle into a rest. They use less water and almost no nutrients.

Here is the whole winter playbook in one table. The rest of the guide unpacks each row.

Water less — the single biggest adjustment

If you change only one thing this winter, change how often you water. With lower light and cooler temperatures, plants grow less and drink far less, so soil stays wet for much longer. A plant that wanted water twice a week in August may want it once every week or two now. The established winter guidance is to keep the compost only barely moist — many houseplants can sit for a week or two without water in a cool room.

The rule that keeps you safe: water by the soil, not the calendar. Push a finger in — if the top inch (about 2–3 cm) is still damp, wait. If you use a decorative outer pot or cover, tip away any water that collects in the bottom about ten minutes after watering, so the roots never stand in it. Overwatering is the most common way houseplants die, and it does its worst damage in winter when the soil simply can't dry out. For the full method — how far to let each type dry, how to read a heavy versus light pot, and the plants that break the rules — see the full guide to how often to water houseplants in winter, and our data-backed overwatering report on why it's the number-one killer.

Growth slows — expect a rest, not a decline

A houseplant that stops pushing new leaves in January usually isn't unwell — it's resting. Reduced light and cooler nights put most tropical foliage plants into a semi-dormant state where they conserve energy rather than grow. This is normal and healthy. It's also why the other winter rules exist: a resting plant needs less water and no feeding, and disturbing it does more harm than good.

Practically, this means don't repot and don't try to force growth over winter. Save repotting, hard pruning and propagation for spring, when the plant has the light and warmth to recover. A little leaf loss or a pause in new growth is expected. True bulbs and some plants take a deeper, more deliberate rest — for what dormancy actually is, which plants do it, and how to tell resting from struggling, read do houseplants go dormant? Winter rest explained.

Stop feeding — or nearly

Fertiliser feeds growth, and in winter there's very little growth to feed. Pushing nutrients into a plant that can't use them just leaves salts building up in the soil, which can scorch roots. The simplest approach for most foliage houseplants is to stop feeding from mid-autumn until spring and resume only when you see new growth and the days lengthen.

A sensible ceiling is no more than once a month over winter, because light levels are too low for the plant to turn fertiliser into good growth. Some plants are exceptions — winter bloomers and anything still actively growing under strong light or grow lights may want a light, dilute feed. For where the line sits for your plants and how to restart safely in spring, see should you feed houseplants in winter?

Light — work with short, weak days

Winter light is the constraint you can't fully fix, only manage. The sun is lower and weaker and the days are short, so a plant that was happy a few feet back from a window in summer may now be starved. Two easy wins make a real difference:

• Move plants toward your brightest window. South- and west-facing windows give the most winter light; set light-hungry plants close to the glass (but not touching it) and bring anything out of a dark corner for the season.
• Clean the leaves. A film of dust blocks a surprising amount of light. Wipe foliage with a damp cloth so every leaf works at full capacity.

Rotate pots a quarter turn each week so plants don't lean, and consider a grow light for a genuinely dark room. For the fuller short-day toolkit — reading light levels, positioning by window direction, and when a grow light is worth it — see winter light for houseplants.

Dry heated air — put the humidity back

Central heating is brutal on humidity. As it warms a room it drives the relative humidity down, and many popular houseplants — ferns, calatheas, marantas, orchids, and other thin-leaved tropicals — prefer roughly 40–50%, well above what a heated room often provides. The classic winter symptoms are crispy brown leaf edges and tips.

You don't need to humidify the whole house, just the air around the plants. Group plants together so they share the moisture they release, stand tropical types on a wide tray of pebbles topped up with water (the pot sits on the stones, above the waterline, and the evaporating water lifts local humidity), or run a small humidifier near your fussiest plants. A bathroom or kitchen is often the most humid room in the house and a good winter home for a struggling fern. Misting helps only briefly and isn't a substitute. The most common single cause of dry winter air is the heating itself — for the full set of fixes, including where to place plants relative to radiators, see houseplants and central heating — the fixes.

Keep plants off cold glass and away from radiators

Winter creates two opposite hazards in the same room, and both come from placement. On one side, the air right against a cold windowpane can be many degrees colder than the room, and leaves touching frosty glass overnight can be damaged. On the other, a plant sitting above or beside a radiator or heating vent gets blasted with hot, drying air.

Most tropical houseplants are happiest around normal living-room temperatures — roughly 65–75°F (18–24°C) in the day, a little cooler at night. As a working rule, keep the room from dropping below about 50°F (10°C) for tender tropicals, since sustained cold below that stresses or kills them. The practical steps:

• Pull plants a few inches back from cold windows, especially at night. If a windowsill frosts, move the plant into the room at dusk or slip an insulating layer (a curtain or card) between plant and glass.
• Don't sit anything directly over a radiator or in the path of a heat vent. Redirect or shield the hot airflow if you can.
• Avoid sudden swings and cold draughts from opening doors — most plants tolerate cool far better than they tolerate a sharp change.

Flowering plants and holiday plants are the most draught-sensitive of all; steady placement is what keeps buds and blooms from dropping.

Your winter routine, in three steps

1. Today: Check every plant's soil with a finger and water only the ones that are dry. Move light-lovers toward your brightest window and pull anything off a cold sill or off a radiator.
2. This week: Put your last feed away until spring, wipe the dust off glossy leaves, and set up one humidity fix (a pebble tray, a plant huddle, or a humidifier) for your tropical foliage.
3. This month: Switch to checking soil before every watering rather than watering on a schedule, and resist the urge to repot or prune — let plants rest until the days lengthen. Browse plant-care guides by species to fine-tune the plants that need special winter handling.

Common winter mistakes to avoid

1. Watering on the same schedule as summer — the top cause of winter root rot. Let the soil, not the calendar, decide.
2. Feeding a resting plant — it can't use the nutrients, and salts build up. Hold off until growth returns.
3. Leaving plants in a now-dark corner — a spot that was bright enough in June can be far too dim in December.
4. Ignoring the heating — dry air and hot vents cause the crispy edges people blame on watering.
5. Panic-repotting a plant that's just resting — a pause in growth is normal; disturbing the roots in winter sets it back.

Related articles

• How often to water houseplants in winter — the finger test and drying times by plant type
• Do houseplants go dormant? Winter rest explained — resting versus struggling, and what not to disturb
• Should you feed houseplants in winter? — when to stop and how to restart in spring
• Houseplants and central heating — the fixes — humidity, placement, and dry-air damage
• Winter light for houseplants — short-day fixes — window direction, cleaning leaves, and grow lights
• The overwatering report — the data on why overwatering is the top killer
• Plant-care guides by species — winter tweaks for individual plants

Reviewed and updated by the Growli editorial team. For questions about anything here, open Growli and ask — or email hello@getgrowli.app.