Winter is probably the easiest time of year to kill a houseplant. Grueling growing conditions like lower light levels, dry air, shorter days and chilly temperatures put houseplants through the paces. The secret to helping plants survive winter is adjusting care routines to suit seasonal growing conditions. Review the basics to give your houseplants top-notch care this winter.
In winter, the sun slips lower in the sky and light levels near windows drop up to 50%. Houseplants that grow near a sunny eastern or northern window in summer may need a southern or western exposure in winter. Likewise, plants near western or southern windows that need filtered light in summer may be able to withstand direct sun in winter.
To help plants cope with changing light levels:
Most houseplants are tropicals and prefer temperatures between 65-75°F during the day and about 10 degrees cooler at night. For many plants, temperatures below 50°F can cause problems.
Adjust thermostats to cater to your comfort, but remember your plants need some consideration.
Homes may offer only 5-10% relative humidity in winter. Houseplants like 40-50%. Signs of low humidity stress on plants include brown leaf tips and appearance of pests like Spider Mites. Learn simple ways to improve humidity around plants.
The most common problem houseplants suffer from in winter is overwatering. About 95% of houseplants need soil to dry out almost completely before watering. How can you tell if plants need water?
In mild climates, continue to fertilize plants through winter. In coldest climates where natural light levels are low, do not fertilize houseplants in winter. Resume fertilizing when outdoor plants wake up in spring.
Winter growth can be leggy. Pinch plants to promote branching and bushiness.
The right time to repot most houseplants is during periods of active growth – in spring and summer. The exception is potted woody plants that go completely dormant in winter. Transplant those prior to bud break in early spring.
Avoid placing plants near cold drafts or heat sources. Avoid placing plants near cold drafts or heat sources. Don't just spot test the soil surface. Plants need water when the root zone is dry. Poke your finger into soil up to 2 inches. If the soil is dry, water.