Overwintering Hibiscus Trees Indoors in Toronto

Hibiscus trees dropping leaves in a Toronto (Zone 6a) home is normal semi-dormancy triggered by reduced light intensity—not a death sentence.

Winter Care Protocol

• Light: Sunniest window (south). Supplement with grow light 12 hrs/day if possible.
• Water: Once weekly, barely moist. No fertilizer.
• Humidity: Pebble tray or humidifier—dry air accelerates leaf drop.
• Temperature: 60–65°F ideal. Avoid hot drafts.
• Accept the look: Leafless stems are fine. Green bark = alive.

Spring Transition (Late May)

1. After frost danger passes, place outdoors in full shade 10 days.
2. Gradually increase sun over a week.
3. Resume watering/feeding. New leaves emerge rapidly.

Don't Panic

Leaf drop ≠ dead. Hibiscus are tough. Consistent minimal care through winter yields vigorous spring recovery.