1. Repot plants cautiously
While repotting in fresh soil often revitalizes container foliage in spring, winter dormancy calls for more caution. If necessary, you can repot in a slightly larger container using indoor potting mix, but take care not to disturb the roots. Water lightly after repotting and place the plant in a warm spot to prevent shock from potential root damage during the process.
2. Reduce watering frequency
With shorter daylight hours and lower light exposure, most houseplants shift into a period of slower growth in winter. As such, they require less frequent watering to prevent soggy soil. Allow the top inch of soil to dry out before adding more water. For many plants, you may only need to water every 2-3 weeks unless the air is exceptionally dry. Pay close attention to any wilting or drooping, as it likely signals under-watering.
3. Monitor and increase humidity
Our indoor heating systems can zap moisture from the air, leaving it very dry. Most houseplants prefer 40 percent to 60 percent relative humidity, much higher than winter indoor levels. This dry air can stress them out. Help counteract the arid environment by using a humidifier or placing a tray filled with pebbles and water nearby so the water can slowly evaporate. Misting your windowsill floral whenever the surfaces of their leaves feel dry or running a humidifier in the room can help, too. Crispy leaf edges or brown spots are signs that increasing the humidity would benefit your leafy companion.
4. Provide sufficient sunlight
Before assuming your shelf sprout needs to be moved, first observe if they are getting adequate sunlight in their current winter positions. While growth is limited due to shorter days and weaker light, most houseplants can adapt. If you do notice stretched stems, leaning leaves or drooping leaves, a spot with better access to windows is likely necessary. Southern and western exposures tend to offer the brightest indoor light during winter. Giving the sunniest location in your home over to struggling plants can work magic.
5. Maintain ideal temperatures
The ideal temperature range for most indoor plants through their period of winter rest is 60-75°F. Exposure to cooler air from windows or drafts from doors can shock them. Avoid placing plants on window sills or near heating vents to prevent temperature extremes. If moving a plant is not possible, placing barriers like curtains between it and cold windows can shield sensitive leaves. Grouping plants together also creates a warmer microclimate around them.
6. Use diluted fertilizer sparingly
Since plant growth naturally slows during short, dark winter days, they cannot use as many nutrients. The general guideline is to use only 1/2 strength fertilizer, if you choose to feed houseplants at all over winter. This provides them essential minerals without overloading roots. Another tip is to apply fertilizer only every second or third regular watering. Providing too many fertilizer salts can damage your plants' small root structures. If leaves start turning brown at the tips or you notice white crusty deposits, immediately stop fertilizing and flush the soil. Once improved, resume at a lower dose.
7. Monitor for pests
Keep a watchful eye out for tiny pests like spider mites or mealybugs, which thrive in drier conditions. Check leaf undersides and stem joints carefully. At the first signs of infection, isolate and treat the plant to prevent spreading. Insecticidal soap, neem oil or horticultural oils help address infestations without damaging plants.
8. Remove dust buildup
To help your flora friend make the most of available light, periodically wipe or rinse foliage to remove any accumulated dust or grime. Use a soft damp cloth to gently brush leaves, taking care not to damage delicate tissue. Not only does this maximize light absorption, but maintaining clean leaves also promotes healthy respiration and growth. Your plants will thank you!