How to Bring Houseplants Inside for Winter Without Losing Them

Moving houseplants outdoors for summer gives them a growth boost that is hard to replicate indoors. But bringing them back inside in autumn is where most plant owners lose plants — not from the cold, but from the transition.

The shock of moving from bright, humid outdoor conditions to dim, dry indoor air causes leaf drop, pest outbreaks, and stalled growth. The plants that survive the move are the ones whose owners took the transition seriously.

Here is the full process: when to move, what to check, how to acclimate, and how to avoid the three mistakes that kill plants during this transition.

When to Bring Houseplants Inside

The timing matters more than people realize. Bring plants in too early and they miss weeks of beneficial outdoor light. Bring them in too late and cold damage may already be done.

The 50°F (10°C) Rule

Most tropical houseplants begin to suffer when nighttime temperatures consistently drop below 50°F (10°C). For cold-sensitive species like Peace Lily, Calathea Orbifolia, and Peacock Plant, the threshold is closer to 55°F (13°C).

Check your local forecast starting in early autumn. When nighttime lows are predicted to reach 50°F (10°C) within the next week, it is time to start the transition.

Species-Specific Timing

Step 1: Inspect and Debug Before Moving

This is the most important step and the one most people skip. Bringing pests indoors means infesting every plant in your home.

What to Look For

Check every surface of the plant — leaf tops, leaf undersides, stems, soil surface, and the underside of the pot:

• Aphids: Clusters of tiny green, black, or white insects on new growth and leaf undersides
• Spider mites: Fine webbing in leaf joints, stippled yellowing on leaves
• Mealybugs: White cottony masses in leaf crevices and stem joints
• Scale: Brown or tan bumps on stems and leaf undersides that do not wipe off easily
• Fungus gnats: Small black flies hovering around the soil surface

For a complete pest identification guide, see our common houseplant pests article.

How to Debug a Plant

1. Hose down the plant — Use a gentle stream of water to wash off the entire plant, focusing on leaf undersides and stems
2. Spray with insecticidal soap or neem oil — Coat all surfaces thoroughly, including stems and soil surface
3. Repeat after 7 days — A second application catches eggs that hatched after the first treatment
4. Quarantine for two weeks — Keep the plant isolated from other indoor plants during the transition period

Check the Soil

Outdoor plants may have ants, slugs, or other creatures living in the drainage holes or under the pot. Lift the pot and inspect the bottom. If you see any signs of pest activity in the soil, consider repotting with fresh mix before bringing the plant inside. See our houseplant soil guide for choosing the right replacement mix.

Step 2: Acclimate Gradually

Plants that have spent months in bright outdoor light will shock if moved directly to an indoor window. The light intensity indoors — even at a south-facing window — is a fraction of outdoor light.

The 7-to-14 Day Transition

Signs of Acclimation Stress

Some leaf drop during the transition is normal. A plant may lose 10 to 20% of its older leaves as it adjusts to lower light. However, watch for:

• Sudden widespread leaf yellowing → the transition is too fast, slow it down
• Leaves dropping while still green → temperature or humidity shock
• New growth wilting → the plant is not getting enough light even indoors

For plants showing significant stress, see our guide on why houseplant leaves turn yellow and why houseplants droop.

Step 3: Adjust Watering and Feeding

Outdoor plants in bright light and warm air use much more water than the same plant indoors. When you bring a plant inside, its water consumption drops dramatically — sometimes by 50% or more.

Watering After the Transition

• Reduce watering frequency — the soil will stay wet much longer indoors
• Check soil moisture before watering, always — see our watering guide for the finger-test method
• Water deeply but less often rather than giving small frequent sips
• Empty saucers after watering — never let the plant sit in standing water

Stop or Reduce Fertilizing

Most houseplants enter a semi-dormant period in winter. Growth slows, and the plant does not need regular feeding. Continuing to fertilize on a summer schedule can cause salt buildup in the soil, which damages roots.

Stop fertilizing about two weeks before bringing the plant inside. Resume light feeding in spring when you see new growth. See our fertilizing guide for seasonal timing.

Step 4: Manage Humidity Indoors

The single biggest environmental change when moving plants inside is humidity. Outdoor summer air is often 50 to 70% humidity. Heated indoor air in winter can drop to 15 to 25% — drier than a desert.

Plants that evolved in humid tropical environments — Boston Fern, Bird's-nest Fern, Calathea Orbifolia, Peace Lily — will show crisp brown leaf edges within days if humidity is not addressed.

How to Raise Indoor Humidity

• Use a humidifier — the most effective method, raises humidity for a whole room
• Group plants together — plants release moisture through transpiration, creating a shared microclimate
• Use pebble trays — fill a shallow tray with pebbles and water, place the pot on top (water should not touch the bottom of the pot)

Avoid misting as a primary humidity solution — it lasts only minutes and can cause problems for plants that do not like wet leaves. See our humidity guide and houseplants that don't like wet leaves for details.

Step 5: Find the Right Indoor Location

After acclimation, place the plant in its winter home based on its light needs:

See our light guide for a detailed breakdown of indoor light levels.

Common Mistakes to Avoid

1. Bringing plants in late October when nights are already near freezing — cold damage may be invisible but will show up weeks later as leaf drop and dieback
2. Skipping the pest inspection — one infested plant can spread mites or mealybugs to your entire indoor collection within days
3. Moving plants directly from full sun to a north-facing window — the light drop is too extreme; acclimate gradually
4. Keeping the same watering schedule — overwatering is the leading cause of plant death in winter because soil stays wet for weeks
5. Placing plants near heating vents — hot, dry air blowing directly on plants causes rapid dehydration and brown tips

Companion Article: Moving Plants Outside in Spring

When the weather warms up again, you will need to reverse the process — but even more carefully, because sunburn is a bigger risk than leaf drop. See our guide on putting houseplants outside in summer for the spring transition process.

Summary

The plants that survive winter are the ones whose owners plan the transition. Do not wait for the first frost warning — start the process when nights begin dropping below 50°F (10°C) and your plants will adjust without drama.