Indoor Plant Care in Winter

1. Winter and Its Challenges for Indoor Plants

Winter in Canada and other cold climates can last for months with weak sunlight, low temperatures, and extremely dry indoor air. For tropical houseplants like monstera, pothos, or calathea, this is a stressful time where cold roots, leaf drop, and stunted growth are common. Some plants enter a dormant phase to protect themselves, but without proper care, they may weaken or fail to recover in spring. That’s why winter plant care must be adjusted, focusing on temperature, light, and moisture to help plants survive until the growing season returns.

2. Keeping Roots Warm – A Critical Step for Plant Survival

Roots are highly sensitive to cold. Placing pots directly on cold floors (tile or hardwood) can chill the root zone and lead to root rot or inactivity. To prevent this, use insulating layers under the pots—such as foam pads, wooden trays, or rugs. Avoid placing plants next to cold windows or drafty doors. The ideal indoor temperature for most plants is 18–24°C (64–75°F). Tropical plants like monstera, calathea, or alocasia may show stress if temperatures fall below 15°C (59°F) at night. Keeping the root zone warm and stable is one of the best ways to protect plant health during winter.

3. Reduce Watering and Supplement Light Properly

Plants absorb water much more slowly in winter. Keeping soil constantly moist can lead to overwatering and root rot. You should reduce watering frequency—only water when the top 2–3cm (about an inch) of soil is dry, or use a moisture meter. Low light and shorter days also mean plants get less energy. Place them near the brightest window, preferably south-facing. If natural light isn’t enough, consider using grow lights for 8–10 hours per day to support healthy photosynthesis and prevent leggy or dropping leaves. Avoid placing grow lights too close to the plant to prevent leaf burn.

4. Prevent Premature Dormancy – Keep Conditions Steady

Not all plants need to go dormant in winter. When exposed to poor light, dry air, and cold temperatures, many plants will slow down or stop growing. But you can help them stay semi-active by maintaining a consistent temperature, adding light, and avoiding sudden changes in location. Don’t fertilize during winter—plants won’t absorb nutrients effectively and may become stressed. Be patient: while your plants may not grow much now, they’ll bounce back quickly in spring if they’ve been kept warm, well-lit, and hydrated just right through the cold season.