Troubleshooting
Hoya caudata (Sumatra) problems — and how to fix them
Hoya caudata (Sumatra) (Hoya caudata) 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 from overwatering
Soggy, poorly draining media is the top killer; leaves yellow and stems blacken when roots suffocate in constantly wet soil.
Wrinkled or soft, droopy leaves
Usually a sign of underwatering or root damage, the thick leaves lose firmness when the plant cannot take up enough water.
Mealybugs
White, cottony insects hide in leaf joints and on undersides, sucking sap, treat with insecticidal soap, neem oil, or 70% isopropyl alcohol on a swab.
Spider mites
Fine webbing and yellow stippling, especially in hot, dry air, rinse the foliage and apply neem or insecticidal soap, and raise humidity.
No flowers
Insufficient light or a plant that is too young, give brighter indirect light, keep it slightly pot-bound, and never cut off the bare flowering spurs.
Cold or draft damage
Stems and leaves suffer below about 15 C (59 F) and near cold windows, heaters, or AC drafts, keep temperatures stable and warm.
Prevent hoya caudata (sumatra) problems before they start
Most hoya caudata (sumatra) issues are care-mismatch, not bad luck. Dial in the basics:
Hoya caudata (Sumatra) problems — FAQ
Why is my hoya caudata (sumatra) root rot from overwatering?
Soggy, poorly draining media is the top killer; leaves yellow and stems blacken when roots suffocate in constantly wet soil.
Why is my hoya caudata (sumatra) wrinkled or soft, droopy leaves?
Usually a sign of underwatering or root damage, the thick leaves lose firmness when the plant cannot take up enough water.
Why is my hoya caudata (sumatra) mealybugs?
White, cottony insects hide in leaf joints and on undersides, sucking sap, treat with insecticidal soap, neem oil, or 70% isopropyl alcohol on a swab.
Why is my hoya caudata (sumatra) spider mites?
Fine webbing and yellow stippling, especially in hot, dry air, rinse the foliage and apply neem or insecticidal soap, and raise humidity.
Why is my hoya caudata (sumatra) no flowers?
Insufficient light or a plant that is too young, give brighter indirect light, keep it slightly pot-bound, and never cut off the bare flowering spurs.
Why is my hoya caudata (sumatra) cold or draft damage?
Stems and leaves suffer below about 15 C (59 F) and near cold windows, heaters, or AC drafts, keep temperatures stable and warm.