Answer: It sounds quite odd, doesn't it? I think I'd be curious enough to dig the plant up this fall and check out the root system. Even when plants are adjacent to one another in the same flower bed, some things can be different including drainage, soil type or soil pH. Dig the plant up, amend the soil with some organic matter to facilitate good drainage, prune off any damaged or diseased roots (anything mushy) and then replant your hydrangea. Let's hope it blooms for you next year!
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