Lisa, there seems to be a lot of this going around...there was a post a month or so ago from another woman whose DH ("dear" or maybe something else
) dumped boatloads of dirt onto her just-planted garden.
pd's advice is always very good but, maybe, if DH goes out and BUYS another Nikko Blue hydrangea (so that you have two
of them), he'll have a better memory of what it looks like.
I would also recommend putting a little fence around it for protection until it's, oh, 4 feet tall and 4 feet wide...with a tag saying "Nikko Blue Hydrangea--I will tend this plant personally" or whatever you think will work.
Just after we moved to this house, FIL and MIL came for Christmas Day. (Oh, joy.) They wanted to "help" in the yard, so I asked DH if he would point out the specific weed species we needed removed and help them with tools, buckets, etc. The ground was wet from rain, and the weeds were coming out easily.
I had to go inside and prepare dinner.
When I went back outside, *scorched earth* greeted me. All the flat Italian parsley, all the wild onions, but only *some* of the weeds were gone. And, of course, the parsley & onions were really gone, because of the wet ground. DH said he had been working "somewhere else." Our yard is so small that there wasn't anywhere else...
That was 11 years ago. The parsley has never come back, despite all my encouragement. I planted some flat-leaf parsley in several locations, but it has never flourished like those original plants did.
But your hydrangea's roots seem to be unimpaired, so you'll probably get good, new growth if you protect the plant as pd recommends.
And don't forget the fence...
Sunset Zone 17, USDA Zone 9