With a better look at the foliage, it looks like a shrub that I used to sell, but I can't remember whether it was a Hydrangea, or a Viburnum. Will keep researching! :)

hmm I think you're in the 'ballpark' Viburnums & Hydrangeas both do very well here. There's a continuous cool breeze coming off the Hudson River. These big pink plumes remind me of cotton candy.

its spirea come in many colors

Spirea was what I thought too but my memory for names went blank on me...
Definitely not a hydrangea or a viburnum.

I think it's Filipendula rubra or a cultivar of this.

Landgirl, you're probably right, in which case it's nothing that I would have sold--Filipendula doesn't grow in my climate! I was fooled by an apparent pair of opposite leaves, but closer examination shows that those are a fluke.

Hmm..now I wonder what it was that I was selling! :]

Thanks Everybody for helping out with this. I know this was a tough one but I think you nailed it.