Our rhody is turning black on the branches, and has a ton of white spots on those black branches.   When pinched, these white spots have a purple color to them.  Also, the leaves are turning black, and the texture is rough.   What is this.   I cannot find it anywhere

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ph for rhododendron is 5.0-6.0.........................it might have been hit by frost.  also sounds like a fungus, don't water the leaves only UNDER the plant.  Visit Walmart, Lowes or Home Depot, they have a premade spray.  I know that ours is acting up from the heavy deep snow, but your sounds like fungus.  They might have a multipurpose spray .  Good luck with your plant.

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