Yellow leaves - Knowledgebase Question

Victorville, Ca
Question by Dstkwell
June 28, 2009
I purchased several Gardenia August Beauty plants from Home Depot a few months ago. All are doing well except one. Almost fifty percent of the leaves have turned yellow on the affected plant. Is the plant dying and will the problem spread to the other plants. I planted all plants using Gromulch and they are watered daily. Can the plant be saved? The plant was fine for the first several months.


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Answer from NGA
June 28, 2009

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Gardenias tend to lose their oldest leaves about this time of year, in preparation for producing healthy new foliage. Since only one plant is reacting this way, it might be that it is suffering from some root stress, or there might be an insect problem. Aphids can cause yellowing leaves, as can spider mites. If you find webbing on the undersides of the leaves or where the leaves meet the stems, you've got a spider mite problem. A miticide will take care of them. Hosing the plants off once a week or so will keep spidermites from camping out in your gardenias and will also rinse dust off the leaves. Sometimes a light pruning will encourage a flush of healthy green growth. Hope this helps!

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