How do gardeners control the spread of Hydrangea?

How does one control the spread of hydrangea plants? We look after a Front Garden that is the entrance to our Subdivision, and the hydrangea have literally taken over the front Garden. They are very hard to dig out, as they send out long roots that are getting involved with the evergreens? I cut off the blooms every Fall, but come Spring new shoots are everywhere! Help!

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