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Over the years, Gerry has answered more than 5,000 of your gardening questions. His knowledge is based in science and practical experience, and by working on radio and television.
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I cannot seem to grow Rhododendron. I set the Rhodo's in Brown Gold. Dug a deep hole and filled it with brown Gold. However even a large Rhode is now starting to turn black - this will spread and kill the entire plant. A smaller Rhode is already ravished and died as per pictures. Thanks Gerry. If you have any solutions. I live on the side of south facing hill. Open to elements. I thought Rhodo's were hardy.
I transplanted red dogwood I found in the bog earlier this year. It started to grow and looked well, new leaves and all. Now leaves are turning black on some plants and all the green vegetation is blackening on those sick plants. I am afraid it might spread - what ever it is?
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