A Beginner's Guide to Houseplant Care

Why British Winters Ask More of Your Plants

For much of the year, a British home is a fairly forgiving place to keep a houseplant. Then October arrives, the heating comes on, the daylight shrinks to a grey handful of hours, and everything you thought you knew about your windowsill jungle shifts a little. The reassuring news is that most indoor plants are tougher than we give them credit for. They don't need you to try harder through the darker months — they need you to change a few habits. Get light, water and humidity roughly right and your plants will quietly coast through to spring.

Start With Light, Because Everything Else Follows

Light is the engine behind every other plant process, including how much water a plant can actually use. In winter, the light coming through a north-facing window can be ten times weaker than it is in June, which is why so many plants look tired and leggy by February. Move the ones that can take it into the brightest spot you have — a south- or west-facing windowsill is ideal from November to March, even if it would scorch them in July. Bring plants closer to the glass, within 30 to 60 centimetres, and give them a quarter turn each week so they don't lean permanently towards the light.

• Clean the leaves. A dusty leaf can lose a surprising amount of the light it collects. Wipe with a damp cloth once a month.
• Don't trust a "bright room". If you can't comfortably read a book there without a lamp, it's shade to a plant.
• Watch for the signals. Pale, stretched stems and tiny new leaves mean too little light. Crisp brown patches mean too much direct sun.
• No natural light? A small LED grow light on for ten to twelve hours a day will keep most foliage plants ticking over nicely.

Watering: Where Most Houseplants Are Lost

Overwatering kills far more houseplants than neglect ever does, and winter is when the damage is done. With less light, plants slow down and drink less, but we carry on watering on autopilot. As a rough guide, most plants need around half the water between October and March that they get in summer, and some — snake plants, cacti, ZZ plants — need barely any at all.

Always test before you pour. Push a finger two to three centimetres into the compost; if it feels cool and damp, walk away. When you do water, do it properly: soak until it runs out of the drainage holes, then empty the saucer so the roots aren't sitting in a puddle. Little and often is the worst possible approach. Use tepid water rather than straight from the cold tap, and if you live in a hard water area, let it stand overnight first.

• Snake plant, ZZ plant, succulents: every three to four weeks, letting the compost dry out completely in between.
• Pothos, spider plant, philodendron: when the top two to three centimetres are dry, roughly every ten to fourteen days.
• Peace lily, ferns, calathea: keep lightly moist and check twice a week, but never soggy.

Humidity, Central Heating and Dry Air

Central heating does wonderful things for our comfort and terrible things for tropical plants. Indoor humidity can drop well below 30 per cent in a heated flat, while most foliage plants evolved in rainforest conditions and prefer something closer to 50 or 60 per cent. The telltale signs are brown, crispy leaf edges, curling new growth and flower buds that drop before opening.

• Group plants together so they share the moisture they release.
• Stand pots on a pebble tray with water kept just below the stones.
• Keep plants away from radiators, and off the top of anything that radiates heat.
• Bathrooms and kitchens suit ferns and calatheas beautifully — as long as there's some light.

Misting is a lovely ritual and helps keep leaves clean, but the humidity boost lasts only minutes. It's not a substitute for a pebble tray or a humidifier.

Temperature, Draughts and the Windowsill Trap

Most houseplants are happiest between 15°C and 24°C, which is roughly where we keep our homes anyway. The difficulty is the gap between a warm room and a cold pane of glass. On a frosty night, the air right against a windowsill can be several degrees cooler than the rest of the room, and cold, wet roots are a fast route to rot. If you can, pull plants a little away from the glass after dark, or move them to a warmer spot for the coldest weeks of January. Avoid draughty hallways and front doors, and keep plants clear of open fires and radiators.

Feeding, Resting and Small Winter Jobs

From roughly October to March, most houseplants are semi-dormant. Stop feeding, or at most give a quarter-strength feed once a month to anything still actively growing. Start again in March when you see new growth. Hold off repotting until spring too — roots don't knit into fresh compost well in low light.

Use the quiet months for a bit of gentle housekeeping. Check leaf undersides for pests: fungus gnats usually mean soggy compost, while spider mites thrive in dry, warm air and leave fine webbing. A monthly wipe with a damp cloth deals with most of it. And if you're just starting out, choose plants that forgive a dark, heated flat: snake plant, ZZ plant, pothos, spider plant and the ever-reliable cast iron plant. Start there, and add the fussier ones once you've found your rhythm.