How to Keep Indoor Plants Healthy in Winter

Winter changes the conditions inside your home in ways that can affect houseplants even when your heating and daily routine stay the same. Shorter days can reduce available light, indoor heating can make the air drier, and cold windows or drafts can create temperature changes.

The good news is that most houseplants don’t need a completely different care routine. They usually need less water, enough available light, fewer nutrients during periods of slow growth, and protection from extreme temperature changes.

Here’s what to adjust when winter arrives.

Why Winter Can Be Hard on Houseplants

Three major changes affect many indoor plants during winter: light, moisture, and temperature.

Shorter days and changing sun angles can reduce the amount of useful light reaching a plant. A location that worked well during summer may no longer provide enough light once winter arrives. Extension guidance recommends watching for signs such as stretched growth or plants leaning toward a window. University of Minnesota Extension

Indoor heating can also make the air considerably drier. Some humidity-loving plants are more sensitive to this change than drought-tolerant plants. Penn State Extension

Temperature changes matter too. Plants placed directly beside cold windows, frequently opened doors, radiators, or heating vents may experience conditions that are less stable than they need. Illinois Extension

Water Less Often, But Check the Soil First

One of the most common winter mistakes is watering a plant according to the same calendar used during summer.

Many houseplants grow more slowly during winter, which can reduce their water needs. However, there isn’t one correct winter watering schedule for every plant. Soil type, pot size, plant species, temperature, humidity, and available light all affect how quickly the soil dries. Illinois Extension

Instead of automatically watering every week, check the soil before adding more water.

Depending on the plant, you may be able to check the upper portion of the potting mix with your finger. If the soil is still appropriately moist for that particular plant, wait and check again later.

Signs You May Be Overwatering

• Soil remains wet for an unusually long time
• Leaves become yellow or soft
• The potting mix develops a musty smell
• Growth becomes weak while the soil stays consistently wet

Plants that prefer drier conditions, such as many succulents, may need a very different watering approach from tropical plants. Always consider the specific plant rather than relying on a universal winter schedule.

Give Plants Enough Winter Light

Light is one of the biggest factors affecting indoor plant growth during winter.

A plant that was happy several feet away from a window during summer may struggle when daylight becomes weaker or shorter. Some plants may start stretching toward the window, producing smaller new leaves, or losing their normal color. Illinois Extension

Move plants closer to an appropriate bright window if necessary, while still considering the light requirements of the individual species.

South- or west-facing windows can provide strong indoor light, but window direction alone doesn’t determine whether a location is suitable. Different houseplants have different light requirements. Illinois Extension

When a Grow Light May Help

Consider supplemental lighting if:

• Your plant is leaning strongly toward a window
• New growth is noticeably smaller or sparse
• Stems are becoming long and stretched
• Your home doesn’t have enough suitable natural light

A suitable LED or full-spectrum supplemental light can help provide additional light during darker periods. University of Minnesota Extension

Rotating plants occasionally can also help expose different sides to the available light. University of Minnesota Extension

Pay Attention to Indoor Humidity

Winter heating can lower indoor humidity, which may be noticeable on plants that prefer more humid conditions.

Ferns and some other humidity-loving houseplants can be particularly sensitive to dry indoor air. University of Minnesota Extension

There are several ways to respond:

Group Plants Together

Keeping several plants relatively close together can create a more humid microenvironment around their foliage.

Use a Humidifier

A small humidifier can be useful when indoor humidity is consistently low, especially for plants that naturally prefer more humid conditions. Penn State Extension

Be Careful With Pebble Trays

Pebble trays are often recommended for increasing humidity, but their effect can be limited depending on the setup and room size. If you use one, keep the plant pot above the water rather than sitting directly in it. Penn State Extension

Also remember that brown leaf tips don’t automatically mean humidity is the problem. Watering issues, cold drafts, pests, and fertilizer problems can produce similar symptoms. Illinois Extension

Keep Plants Away From Drafts and Heat Sources

Avoid placing houseplants directly beside:

• Frequently opened exterior doors
• Drafty windows
• Heating vents
• Radiators
• Other strong sources of hot or cold air

Cold glass can also damage foliage when leaves remain in direct contact with a very cold window. Illinois Extension

You don’t necessarily need to move every plant into the warmest part of your home. The goal is to avoid extreme or repeated temperature changes.

Reduce Fertilizer During Slow Growth

Most houseplants need much less fertilizer when they are not actively growing.

Illinois Extension recommends fertilizing houseplants only when they are actively growing, noting that many plants need little or no additional fertilizer during the short winter days. Illinois Extension

Instead of automatically following a summer feeding schedule, watch the plant.

If growth has slowed considerably, reducing or pausing fertilizer is generally more appropriate than continuing frequent feeding. Once active growth resumes, you can return to the plant’s normal feeding requirements.

Summer Care vs. Winter Care

The exact routine still depends on the plant species and its growing conditions. Illinois Extension

Build a Simple Winter Plant Care Routine

Winter plant care doesn’t need to become complicated.

Before watering: check the soil and consider the plant’s normal moisture requirements.

Every few weeks: look at the plant’s position relative to windows and heat sources. Seasonal changes can alter the amount of light reaching the same spot.

When leaves change: don’t immediately assume the cause. Check light, watering, temperature, pests, and humidity before changing several things at once.

During slow growth: reduce fertilizer rather than automatically continuing a summer feeding routine.

This approach makes it easier to identify what your plants actually need instead of reacting to every small change.

Which Plants May Need More Winter Attention?

Not every houseplant responds to winter in the same way.

Plants that prefer higher humidity may show stress sooner when heated indoor air becomes dry. Ferns are one example of a group that can require more attention to humidity. University of Minnesota Extension

Drought-tolerant plants such as snake plants and ZZ plants generally have different watering needs from moisture-loving plants. That doesn’t mean they can be ignored completely, but their winter routine may involve less frequent watering.

The best approach is to organize your care around each plant’s natural requirements, rather than treating your entire collection as if every plant needs the same schedule.

Final Thoughts

Keeping indoor plants healthy through winter is mostly about recognizing that their growing conditions have changed.

You may need to water less frequently, provide more suitable light, protect plants from drafts, monitor humidity, and reduce fertilizer when growth slows. The exact adjustment depends on the plant, so checking the soil and observing new growth is more useful than following a rigid calendar.

With a few simple seasonal changes, your houseplants can stay in good condition through winter and be ready to respond when brighter spring conditions return.

FAQ

Do indoor plants need less water in winter?
Many houseplants need less frequent watering during winter because growth often slows, but the exact amount depends on the plant and its growing conditions. Check the soil rather than following a fixed schedule. Illinois Extension

Why are my plant leaves turning brown in winter?
Brown or crispy leaves can have several causes, including low humidity, watering problems, cold drafts, pests, or excess fertilizer. Check the plant’s overall conditions before assuming humidity is the cause. Illinois Extension

Should I fertilize houseplants in winter?
Many houseplants need little or no fertilizer while growth is slow. Fertilizing is generally most useful when a plant is actively growing. Illinois Extension

Where should I put houseplants in winter?
Place them where they receive enough light for their species while keeping them away from cold drafts, cold window glass, radiators, and heating vents. Illinois Extension

Can cold drafts harm indoor plants?
Yes. Sudden temperature changes and exposure to cold windows or drafts can stress plants, and cold glass can damage foliage that touches it. Illinois Extension