it’s a jungle in here: helping indoor plants survive the winter

By Mary Sterenberg

Houseplants, like people, tend to hibernate during the short, cold winter days. They require fewer nutrients and grow very little, but there are still a few must-dos in caring for indoor flora.

Continue fertilizing and watering plants that actively grow and flower but give other indoor plants a winter break from fertilizer and daily watering.

“Use your finger and test the top of the soil, and if it’s moist you’re good,” said Barb Arnold, horticultural designer at the Franklin Park Conservatory. Arnold recommends filling a saucer with water once each week and placing the plant in the water for half an hour. If the plant drains the saucer, add a bit more water but discard any liquid remaining after 30 minutes.

Humidity levels plummet as daylight dwindles and cold weather creeps in, drying out not only your skin and hair but your plants as well. Hydrate plants by filling a large saucer with gravel and water and resting plants on the gravel, not touching the water. They will enjoy added humidity as the water evaporates, without becoming oversaturated. Also, scrape off any white crust that forms on the soil—a build-up of salt from the tap water—and add some new soil.

Adequate light also remains important for houseplants during the winter months. Let plants soak up sunlight when it’s available but don’t panic if leaves fall off as the plants adapt to new conditions.

“I can’t tell you how many calls we get from people who bring tropical plants inside and they start losing leaves,” Arnold said. “A plant drops leaves to help keep itself alive, and it doesn’t necessarily mean the plant is in distress.”

In the altered environment, with less light and humidity and colder weather, the new leaves will be half the size of summer growth. But watch for yellowing or changes in the texture of plants’ leaves, as they may indicate insect damage or too much or too little water. Also, Arnold recommends saving plans to transplant until spring.

In March and April, the growth of indoor plants will pick up in response to the longer days and warmer weather. They will sprout their larger summer foliage, requiring additional fertilizer and water. But until spring arrives, cut back on the tender loving care for indoor vegetation—both plants and their owners can stick to a lower pace in the cozy indoors for a few more months.

Mary Sterenberg is a freelance writer from Franklin County.

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