Gardenia infected - Knowledgebase Question

fairfax, Vi
Question by rohini_m_200
May 13, 2010
My Gardenia plant seems to be loosing all the older leaves. There are black spots especially towards the tip of leaves and if u dont pluck them off they drop off in a day or too. Should i prune the plant back. the plant is blooming with buds and young healthy leaves at tip

Answer from NGA
May 13, 2010


I'm not sure whether the black spots are insects or the sign of some disease. Since your plant is putting out new growth and new flower buds, it would be a shame to prune it back - you'll lose all the flowers. I'd take a few of the spotted leaves off the plant, put them in a plastic baggie and see if the spots move off the leaves. If so, you're dealing with insects. If not, you're dealing with a fungal or bacterial disease. You can treat your plant with a fungicide or an insecticide, depending upon what the plastic baggie indicates. Be sure to choose a product that lists gardenia as a plant safe to use the product on. Best wishes with your gardenia.

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