Caring for Houseplants During Darker Winter Months

Why Winter Care Matters

As the days shorten and light levels drop, your houseplants enter a very different phase of life. Most are tropical by nature, adapted to warm, bright, humid conditions. A British winter offers little of that: weak sunlight, short days, cool draughts and dry air from central heating. Growth slows right down, and many plants effectively rest until spring. That means the routine that kept them thriving in summer — regular watering, fortnightly feeds, lush growth — will do more harm than good now. Adjusting your care to match their slower pace is the single most helpful thing you can do.

Ease Back on Watering

Overwatering is the most common way to lose a houseplant in winter. With less light and cooler temperatures, compost dries out far more slowly, and roots take up very little moisture. Before you reach for the watering can, push a finger into the compost. If it feels damp at 2–3cm deep, wait. For most plants, letting the top couple of centimetres dry out is wise. Cacti and succulents may only need a drink every four to six weeks; larger, leafy plants might go a fortnight or more.

• Always use water at room temperature — cold tap water can shock roots.
• Water in the morning so any excess can drain before cooler nights.
• Empty saucers and cachepots after half an hour. Never let roots sit in water.
• When in doubt, wait another day. Slightly dry is safer than soggy.

Watch for yellowing lower leaves, mushy stems or a sour smell from the compost — all signs that you have been too generous.

Move Pots Closer to Natural Light

Light is the fuel for everything a plant does, and winter daylight is precious. Move your pots as close to a window as practical, ideally a south- or west-facing one. A spot that was perfect in June may now be too dim. Clean the glass — grime and condensation can cut light significantly. Rotate each pot a quarter turn every week or so, so all sides get their share and growth stays even.

If your windowsill becomes bitterly cold at night, shift plants to a nearby table or use a piece of cardboard to shield them from the chill. For dark corners, a small grow light on a timer can make a real difference. Finally, dust leaves with a soft damp cloth; a clean leaf captures far more light than a grimy one.

Hold Off on Feeding

Most houseplants do not need fertiliser during the darker months. Feeding a resting plant encourages weak, leggy growth that cannot sustain itself, and unused salts can build up in the compost. Stop feeding around October and do not resume until you see fresh growth, usually in March. Then start with a half-strength dose and build up gradually.

There are exceptions. Winter-flowering plants such as Christmas cactus, or any plant growing under a strong grow light, may appreciate a light feed. But for the vast majority — monstera, pothos, spider plants, rubber plants, ferns — a winter fast is exactly what they need.

Watch Temperature and Humidity

Central heating creates a dry, warm atmosphere that suits few houseplants. Keep pots away from radiators, draughts and open fires. A steady 15–21°C is ideal for most. Grouping plants together raises humidity around them, and a tray of pebbles topped with water beneath the pots adds moisture as it evaporates.

• Mist humidity-loving plants, but avoid fuzzy leaves like African violets, which can rot.
• Move plants off cold windowsills at night if temperatures dip near freezing.
• Brown, crispy leaf edges often signal dry air — a pebble tray helps.

Check for Pests and Keep Leaves Clean

Dry, still air encourages spider mites, mealybugs and scale. Inspect leaf undersides, joints and new growth every week or two. A damp cloth wiped over both sides of the leaves removes dust and many pests in one go. Isolate any affected plant, and treat repeat offenders with an insecticidal soap or neem oil. Remove yellowing or dead leaves promptly so they do not harbour rot or pests. With a little attention now, your plants will reward you with vigorous new growth when the longer days of spring arrive.