10 Winter Care Tips to Keep Your Houseplants Happy and Healthy

Despite their climate-controlled environment, your indoor plants are still vulnerable when it gets cold outside. Drier air and plunging humidity levels can take a toll, so proper TLC is crucial. Here are our 10 best tips for weathering the winter with your potted pals.

1. Protect Your Indoor Plants From Cold Air

Jack Frost can nip your indoor plants in the bud if you’re not careful. Avoid drafty doorways and keep plants at least three inches away from window glass. If your windows aren’t well-insulated, wrap them in clear shrinkwrap (you can find kits at your local big-box retailer or hardware store). Since you still want the plants to soak up the valuable sunshine, this beats relocating them to avoid the draft.

2. Provide Adequate Light

Sunlight is a much rarer commodity in the winter—not only are there fewer daylight hours, but the rays come in at a lower angle and aren’t as intense. You may need to relocate your pots to a sunnier location if possible. Ideally, your sun-loving plants should go near a window that faces west or south.

If your plants aren’t getting enough light, then you may need to supplement with a grow light. Keep in mind that grow lights aren’t as intense as regular sunlight. Most plants will require at least 12 to 14 hours of light, though this will vary based on shade tolerance and your grow light’s intensity.

3. Monitor Your Thermostat

Even when your plants are inside, they’re still vulnerable to low temperatures. Try not to let the thermostat drop below 65 degrees Fahrenheit, even if you’re going out of town. Although most indoor plants are hardy enough to take temperatures as low as 50 degrees Fahrenheit, most will need a warmer climate in order to thrive. Keep in mind that your thermostat most accurately measures the room it’s located in, so it’s best to err on the side of warmer if your plants are on the other end of the house.

4. Keep Plants Away From Heat Sources

Just as cold temperatures can stress out your plants, heat can do a number on them as well. Generally, anything higher than 75 degrees Fahrenheit is a danger zone. This means you’ll need to keep them away from:

• Fireplaces

• Stoves

• Radiators

• Furnaces

• Space heaters

• Any other sources of extreme heat

5. Boost Your Home’s Humidity

A major health benefit of indoor plants is their ability to humidify your home, but they need extra help during the winter months. A room humidifier can make a big difference, or you can get in touch with a local HVAC pro to install a whole-house humidifier.

You can also naturally boost your indoor humidity by leaving out dishes of water near your heater. For even more moisture, keep a spray bottle by your plants and give them a good mist daily.

6. Slow Down Your Watering Routine

You’d think you should water your plants more to help them stay healthy in the winter—but, actually, the opposite is true. Like so many lucky animals, your plants will also “hibernate” by going dormant until spring. During this dormancy, they will need a lot less water since they won’t do much growing. Overwatering can lead to root rot, which can quickly kill your leafy friends.

Here are the best ways to prevent overwatering:

• Monitor soil moisture levels by sticking your finger about three inches deep and watering whenever you feel dry soil

• Keep plants in pots with plenty of drainage 

• Consider getting a soil hygrometer for finicky plants

7. Avoid Watering With Cold Water

An icy drink can shock the roots of your indoor plants, especially during dormant winter months. Be sure you’re using lukewarm water as you fill your watering can. Remember that your sink may take a moment to heat up when it’s colder out, so always do a finger test to be sure.

8. Skip the Fertilizer

Your sleepy plants won’t feel like growing much in the winter, so they typically won’t need any fertilizer (research your plant’s species for exceptions). Feeding them will only disrupt their natural growing cycle and possibly lead to fertilizer burn, so it’s best to skip it until spring. 

9. Avoid Repotting When Temperatures Start Dropping

Winter is not the time to repot your flourishing Ficus. Outside of the regular growing season, a larger pot can stress the plant and make it difficult for roots to absorb water. Save repotting projects for the springtime when you start to notice rich color and new growth.

10. Know Your Plant’s Individual Needs

Caring for indoor plants—or any plants for that matter—is all about knowing the individual needs of your plant’s species. Rather than adhering to a general set of guidelines, research the sunlight, watering, and fertilizing needs of each plant. For diverse collections, you may want to keep notes to remember who needs what and when.