Answer: Your hydrangea is probably in a good location, so moving is not a necessity. Hydrangea's produce blossoms on stems that grow from last year's wood. After the plant blooms, the stems that flowered should be cut to the ground to encourage new stems to grow. The stems that have not flowered should be left to develop buds so they'll bloom the following year. Sounds like all your plant needs is another year to prove itself. The Vinca groundcover should have no effect on the hydrangea's performance.
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