Troubleshooting
Sea Hibiscus problems — and how to fix them
Sea Hibiscus (Hibiscus tiliaceus) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Root rot
Overwatering or poorly drained soil allows Phytophthora and other pathogens to attack roots; leaves yellow and wilt — ensure sharp drainage and allow the topsoil to partially dry between waterings.
Aphids and whitefly
Colonies cluster on young shoot tips and leaf undersides, secreting honeydew that fosters sooty mould; blast off with a strong jet of water or treat with insecticidal soap.
Frost damage
Even brief temperatures below 4°C (39°F) cause blackened foliage and dieback; the plant has no frost tolerance and must be overwintered above 10°C (50°F) in temperate climates.
Prevent sea hibiscus problems before they start
Most sea hibiscus issues are care-mismatch, not bad luck. Dial in the basics:
Looking for sea hibiscus in general rather than its problems? Read the full sea hibiscus care guide — light, water, soil and feeding.
Sea Hibiscus problems — FAQ
Why is my sea hibiscus root rot?
Overwatering or poorly drained soil allows Phytophthora and other pathogens to attack roots; leaves yellow and wilt — ensure sharp drainage and allow the topsoil to partially dry between waterings.
Why is my sea hibiscus aphids and whitefly?
Colonies cluster on young shoot tips and leaf undersides, secreting honeydew that fosters sooty mould; blast off with a strong jet of water or treat with insecticidal soap.
Why is my sea hibiscus frost damage?
Even brief temperatures below 4°C (39°F) cause blackened foliage and dieback; the plant has no frost tolerance and must be overwintered above 10°C (50°F) in temperate climates.