When to Bring Hibiscus Indoors on Long Island: Timing and Transition Tips

Joan on Long Island's South Shore planted a Home Depot hibiscus in the ground in June. She wants to know when to bring it inside for winter.

Timing: Early October

Hibiscus are frost-tender tropicals. On Long Island, bring them in any time in October — don't wait for frost warnings.

Why Early Is Better: The Transition Shock

Plants acclimate to their environment. Cool autumn nights trigger physiological changes (thicker cuticles, altered metabolism). If you wait until a freeze threatens, the plant has already "winterized" for outdoors — then gets slammed by indoor conditions: dry air, steady temps, lower light, tap water. That double shock causes massive leaf drop, bud blast, and spider mite explosions.

How to Transition Smoothly

1. Pot it up now: Large container, quality potting mix.
2. Move indoors early October: Before nights regularly drop below 10 °C (50 °F).
3. Sunniest window: South-facing ideal.
4. Humidity: Run a humidifier or mist daily. Spider mites hate humidity.
5. Water: Let top inch dry between waterings.
6. Scout for mites: Check leaf undersides weekly. Treat at first sign with insecticidal soap.

Don't Fertilize Until Spring

Let it rest. Resume weak feeding in March as light increases.

Early move = happy hibiscus. Late move = crispy, mite-ridden sticks.