Troubleshooting
Cuban Oregano problems — and how to fix them
Cuban Oregano (Plectranthus amboinicus) 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.
Stem and root rot
The most common killer, from overwatering or heavy soil; the fleshy stems turn black and mushy. Use gritty mix and water only when soil is dry.
Leggy, sparse growth
Low light makes stems stretch and flop; move to brighter light and pinch tips regularly to restore a bushy shape.
Frost damage
It is killed by even light frost; bring indoors or take cuttings before temperatures drop below about 10°C.
Mealybugs
White cottony pests hide in leaf joints indoors; wipe off with diluted alcohol and improve airflow.
Prevent cuban oregano problems before they start
Most cuban oregano issues are care-mismatch, not bad luck. Dial in the basics:
Looking for cuban oregano in general rather than its problems? Read the full cuban oregano care guide — light, water, soil and feeding.
Cuban Oregano problems — FAQ
Why is my cuban oregano stem and root rot?
The most common killer, from overwatering or heavy soil; the fleshy stems turn black and mushy. Use gritty mix and water only when soil is dry.
Why is my cuban oregano leggy, sparse growth?
Low light makes stems stretch and flop; move to brighter light and pinch tips regularly to restore a bushy shape.
Why is my cuban oregano frost damage?
It is killed by even light frost; bring indoors or take cuttings before temperatures drop below about 10°C.
Why is my cuban oregano mealybugs?
White cottony pests hide in leaf joints indoors; wipe off with diluted alcohol and improve airflow.