mandeville plant - Knowledgebase Question

haddon heights, nj
Question by dwmattio
July 15, 2007
I purchased a mandeville plant @ home depot in early june. it had been doing well until about 2 weeks ago. I noticed the leaves getting small,black spots then turning yellow and falling off. I have the plant in good potting soil,direct sun and water regulary.I also water with miracle grow.I never had this problem with mandevilles.

Answer from NGA
July 15, 2007


Unfortunately, based on your description I am not able to diagnose the problem specifically. Mandevilla is generally pest and disease free, although I have found some reference to bacterial disease problems that can sometimes occur if the foliage is left wet overnight.

I would suggest you consult with your local Rutgers cooperative extension to obtain a definite identification of the problem and based on knowing that, decide what to do. If a chemical control is needed, they will have the most up to date information on what to use and how/when is best to use it.

In the meantime, avoid wetting the foliage when you water, and keep the plant in a very sunny location with good air circulation. Remove the affected foliage and dispose of it in the trash to limit reinfection. I'm sorry I can't be more specific for you.

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