How to Water Houseplants in Winter

Why plants need less water in winter

Most houseplants are not actively dying in winter — they're simply resting. Tropical species like monsteras, pothos, and philodendrons aren't true dormant plants in the botanical sense, but they do slow their metabolism significantly in response to reduced light. Less photosynthesis means slower growth, which means roots are drawing far less water from the soil.

Lower light also means soil stays wet longer. A pot that drained in five days during July might still feel damp after ten days in December, even if the room temperature hasn't changed dramatically. Overwatering is the single most common cause of winter plant death, and it nearly always starts with ignoring this slower drying time.

Central heating adds a complicating twist: it dries out the air, which can make the top inch of soil feel deceptively dry while deeper soil remains saturated. This is why checking only the surface before watering is especially misleading in winter. Always probe deeper — use your finger, a wooden chopstick, or a moisture meter — before reaching for the watering can.

Which plants need the biggest reduction in watering

Succulents and cacti need the most dramatic cut. Echeverias, aloe vera, haworthias, jade plants, string of pearls, and bunny-ear cacti are all either semi-dormant or in their driest rest period from roughly November through February. Water these plants sparingly — once every three to six weeks, just enough to keep the soil from pulling away from the pot edges completely. Err heavily on the side of dry.

ZZ plants and snake plants are similarly forgiving of long dry spells in winter. Their rhizomes and succulent leaves store water efficiently, and soggy winter soil is a fast route to root rot for both.

Tropical foliage plants — pothos, heartleaf philodendron, Chinese evergreen, monstera, rubber plant, dumb cane, arrowhead plant, and peace lily — should be watered noticeably less often than in summer, but shouldn't be allowed to dry out completely. Reduce frequency by roughly 30 to 50 percent compared to your warm-season schedule and let the top two inches of soil dry before watering.

Humidity-loving plants like calathea, prayer plants, maidenhair ferns, Boston ferns, and nerve plants are a special case. Their soil needs to dry out a bit between waterings in winter just like the others, but their leaves suffer quickly in dry heated air. These plants often need less water at the roots and more attention to ambient humidity at the same time.

Blooming holiday plants — kalanchoe, Christmas cactus, and anthurium — have their own rhythms. Christmas cactus actually benefits from a dry rest period before blooming; kalanchoe prefers to dry out thoroughly between waterings year-round; anthurium should be watered less often in winter but never left bone dry.

How heating and drafts affect your watering schedule

Forced-air heat, radiators, and baseboard heaters all reduce indoor relative humidity, sometimes dramatically — down to 20 to 30 percent in some homes. While this dry air pulls moisture from leaves and accelerates surface soil drying, it doesn't speed up how fast the root zone dries. The result is that the top of the soil looks and feels dry while the bottom third of the pot is still quite wet.

A plant sitting directly beside a heat vent may have its surface soil dry out unusually fast, tempting you to water more. Resist that impulse — check the soil at least two inches down before adding any water. If you can move the plant away from direct heat flow, do so. Your plant will be less stressed and easier to water accurately.

Cold drafts from single-pane windows or poorly insulated walls can chill root zones and slow water uptake, making overwatering even more likely near those spots. If a plant sits in a cold window, slip a thin cork mat or folded towel under the pot to buffer the chill.

Water temperature and quality in winter

Cold tap water straight from a winter faucet can be quite chilling — sometimes below 50°F — which is a shock to warm-growing tropical roots. Always use room-temperature water. Fill your watering can and let it sit on the counter for an hour or two before using it, especially in cold climates.

This sitting time also allows chlorine to off-gas, which is a small benefit for sensitive plants like calatheas and prayer plants. If your home has a water softener, avoid using softened water on plants — the sodium ions used in ion-exchange softeners accumulate in soil and can harm roots. Use unsoftened cold water from a tap before the softener, or collect rainwater if practical.

Signs you're getting the winter balance right — and wrong

Signs of healthy winter watering include firm, upright leaves, steady (if slow) appearance, and soil that dries predictably between sessions. A little less lush growth than summer is completely normal and not a reason to add fertilizer or extra water.

Signs you're overwatering: yellowing lower leaves, stems that feel soft at the base, a sour or musty smell from the soil, fungus gnats hovering around the pot, or soil that never seems to dry out. If you notice these, let the soil dry out thoroughly before watering again and check whether the roots look brown and mushy — a sign of root rot that may need more intervention.

Signs you're underwatering: leaves that droop, curl, or feel papery and thin; crispy brown leaf tips (distinct from the yellowing of overwatering); soil that has pulled away from the pot edges and repels water when you add it. If the soil is so dry it's hydrophobic, try bottom watering to let it slowly reabsorb moisture from below.