What to do with hydrangeas?

Last year a landscaper put in several different plants, including a row of hydrangeas (they bloomed blue and purple).
The growth from last year is brittle and seems dead to me. I noticed some new growth coming out of the ground.
Am I supposed to prune last year's "dead" wood? Do I chop it all off?
Confused, Mitch
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BTW, I'm in Zone 5a.
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I've gotten new growth from the ground and from the ends of those dry looking stalks. I'd wait and see what happens - bet you'll get some growth.
Mitch@this_is_not_a_real_address.com wrote:

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yep, I got the blues and prune the dead flowers off in the fall after the flowers die and go brown or before spring when they start to grow again. I usually have to prune the whole bush other wise it gets too big.
Mitch@this_is_not_a_real_address.com wrote:

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