Winter Houseplant Care: Watering and Light When Days Get Short

Why Winter Changes Everything for Your Houseplants

If you're wondering how to care for plants in winter, here's the short answer: you scale back. As days get shorter, most houseplants sense that less light is coming and enter dormancy (a rest period when growth slows or stops), roughly from November through March. The care that kept them thriving in summer can actually harm them now.

Here's why. When a plant slows its growth, it uses far less energy—and far less water. Watering on your summer schedule leaves soil soggy for days, which is exactly how roots rot. In fact, the two most common winter plant killers are overwatering and too little light (low humidity and pests round out the list). Both come from treating winter like any other season.

Not every plant fully naps, though. Tropicals like monstera, pothos, philodendron, and calathea often keep pushing out new leaves through winter, especially if you run a grow light. Those plants may still want water and food on a lighter schedule.

The takeaway that makes everything below easier: winter care is mostly about doing less, not more. Water less often, feed rarely or not at all, and make sure the light your plants do get actually reaches them. That's the whole game—the sections ahead just show you the specifics.

How to Adjust Watering in Winter

Watering is the single biggest lever for keeping your plants alive in winter. As days get shorter and growth slows, your plants drink far less—so the watering routine that worked in July will drown them in January. The fix is simple: give them less water, less often, and always check the soil before you pour.

Cut both frequency and volume

Don't just wait longer between waterings—give each plant a little less, too. Aim for roughly 25% less water overall, and stretch out the gaps. A plant you watered weekly in summer may go 10 to 21 days in winter. Some growers keep a smaller watering can on hand for the cold months to avoid overdoing it.

Always test the soil first

Before you water anything, stick a finger into the pot. Water only when the top 1 inch of soil feels dry, or when the plant starts to wilt slightly. This matters even more in low light: plants in dim rooms grow slowly and dry out slowly, so they're easy to overwater by habit.

Rough winter intervals by plant

Use these as starting points, then adjust based on the finger test:

• Ferns: every 10–14 days
• Cactus and snake plants: every 3–4 weeks
• Succulents: as little as once a month

Small habits that prevent root rot

• Use room-temperature water. Resting plants dislike the shock of ice-cold water.
• Never let water sit in the saucer. A pot standing in 1–3 inches of water will eventually rot the roots—tip out any excess after watering.

When in doubt, underwater. A thirsty plant perks up within hours of a drink; a waterlogged one with rotting roots is much harder to save.

Maximizing Light on Short, Dark Days

After overwatering, too little light is the second big winter killer. As the sun sits lower and days get shorter, almost every spot in your apartment counts as low light—meaning your plants receive far less usable light than they would in summer. In low light, plants grow slowly and drink less, which is exactly why winter watering slows down too.

Spot the Signs of Too Little Light

Watch for leggy growth: stems that stretch out long and thin as the plant reaches for a light source. Pale or faded leaves and wide gaps between leaves are other giveaways. If you see these, your plant is telling you it needs a brighter spot.

Find Your Brightest Window

Move struggling plants to your brightest windows. South-facing windows get the most light through winter and are usually your best bet, with east- and west-facing windows next. Two cautions:

• Keep leaves from touching cold glass, which can chill or damage them.
• Keep plants out of drafts from gaps around older windows.

Rotate each plant a quarter-turn every month or two so all sides get even light—otherwise plants lean and grow lopsided toward the window.

When to Add a Grow Light

If your apartment stays dim, a grow light (an electric light designed to supplement sunlight) helps almost any houseplant through winter. General guidance:

• Run it 10–14 hours a day. A simple schedule is 8 AM–8 PM. Start around 10–12 hours and adjust from there.
• Set the distance by fixture type. Keep fluorescent fixtures 6–12 inches from the foliage and LEDs 12–24 inches away.
• Raise the light as plants grow so the distance stays consistent.

A basic outlet timer makes this hands-off—set it once and your plants get steady light all winter.

Fighting Dry Winter Air (Humidity)

When your furnace kicks on for the season, it doesn't just warm the room—it strips moisture from the air. Indoor winter air can get as dry as desert air, and that's rough on tropical houseplants that evolved in humid jungles. Dry air causes crispy brown leaf tips and invites spider mites (tiny sap-sucking pests that thrive in dry conditions).

Aim for 40–60% humidity. That range keeps most plants comfortable and makes your home less hospitable to those mites. A cheap hygrometer (humidity gauge) takes the guesswork out.

Easy ways to add moisture:

• Run a small humidifier near your plants—the most reliable fix.
• Group plants together so they share the moisture they release.
• Use a pebble tray: set the pot on a saucer of pebbles and water, keeping the pot above the waterline.

A few extra tricks: mist the air around your plants once or twice a week in the morning, or give tropicals a monthly lukewarm shower to rinse leaves and boost humidity.

Cluster your thirstiest humidity lovers—ferns, calathea, prayer plant, and Rex begonia—in a bathroom or kitchen, where everyday moisture keeps them happiest.

Feeding and Repotting: Why to Wait

Winter is the season to do less, not more. As days shorten, most houseplants slow down or go dormant (a resting phase where growth nearly stops), so the extra care that helps in spring can actually hurt them now.

Pause the fertilizer. For most plants, stop feeding from roughly October through February. Dormant plants aren't using nutrients, so fertilizer just sits in the soil. In the low light of winter, that leftover salt builds up and can burn roots and leave brown, crispy leaf margins (the outer edges of the leaf). Resume feeding in spring, when days lengthen and temperatures warm.

One exception: if a plant is still pushing out new leaves, or lives under a grow light that keeps it actively growing, it may still want light feeding. Feed at a reduced strength and only while you see fresh growth.

Hold off on repotting, too. Skip repotting and transplanting until spring, summer, or early fall. Moving a resting plant into fresh soil disturbs its roots when it has the least energy to recover.

The simple rule: wait for longer days and warmer temperatures, then resume feeding and repotting as your plants wake up.

Temperature, Drafts, and Winter Pests

Winter comfort for your plants is mostly about avoiding extremes. Keep pots away from direct heat sources—heating vents, space heaters, and working fireplaces all dry out leaves and soil fast. Just as important, avoid cold drafts near doors you open often and the chilly glass of winter windows, where leaves touching the pane can get damaged.

Most houseplants are fine with cooler nights, so setting your thermostat back to around 64–65°F won't hurt them. Cacti and succulents actually prefer 55–60°F in winter, which can encourage buds to form. As a rule, don't let any plant sit below 45°F.

Watch for two common winter pests

Overwatering and dry air invite the two pests you're most likely to see this season:

• Fungus gnats — tiny black flies drawn to soggy soil. The fix is usually to water less and let the top of the soil dry out.
• Spider mites — tiny sap-suckers that thrive in dry air and appear as fine webbing on stressed plants. Raising humidity helps prevent them.

To treat either, apply neem oil, insecticidal soap, or a pyrethrin spray (a plant-derived insecticide) every 3–4 days until the pests are gone.

Your Quick Winter Care Checklist

Save this checklist and run through it whenever the days feel short and gray. Overwatering and too little light are the two most common reasons houseplants struggle in winter, so most of these steps guard against exactly that.

• Water less, and check first. Feel the top inch of soil; only water when it's dry. Many plants need it once a week or less in winter—some even less.
• Chase the light. Move plants to your brightest window and rotate them every month or two so all sides get light. Add a grow light if things look leggy.
• Keep humidity around 40–60%. Dry, heated air stresses most tropical houseplants.
• Skip the fertilizer and repotting. Wait until spring, when longer days restart active growth.
• Avoid temperature extremes. Keep plants off cold glass and away from heat vents and drafty doors.