How to Acclimate Outdoor Houseplants for Winter Indoors

Moving houseplants outside for summer gives them a growth boost, but bringing them back inside requires a careful transition. Most houseplants are tropical and cannot withstand temperatures below 45°F (7°C). Without proper acclimation, plants suffer shock, wilting, and leaf drop. Follow these steps for a smooth move.

Prep Before the Move

Pest Inspection & Treatment

Check thoroughly for aphids, mealybugs, spider mites, and other hitchhikers. Wash plants with a hose to dislodge pests, and consider a neem oil treatment for extra protection.

Pruning & Repotting

If the plant grew significantly, prune back no more than one-third of foliage—and trim an equal amount of roots. For repotting, choose a container at least 2 inches larger.

Gradual Acclimation Process

Begin when nighttime temps reach 50°F (10°C) or lower. Over two weeks:

1. Bring the plant inside at night, return it outside in the morning.
2. Gradually increase indoor time each day.
3. After two weeks, keep it indoors full-time.

Indoor light and humidity are dramatically different; this slow transition prevents shock.

Post-Move Care Adjustments

• Water less frequently—only when soil is dry to the touch.
• Clean windows to maximize available sunlight.
• Monitor for stress signs and adjust placement as needed.

With patience, your plants will settle in happily for the winter.