Can't help you --- but it sure looks like an interesting plant!!!

I bought a decorative elderberry a couple of years ago. It very well could have been Sambuca. I remember it was fairly expensive with dark lacey foliage, and stems.

I planted it by my natural pond/stream thinking it liked to be moist.

Didn't do anything really, and didn't come back the next year either. Maybe too much moisture.

I live by Guelph, Ont. zone 5b.

Zone 4 WI. I planted 2 last summer. They did not die back to the ground. I now have new growth on last years stems and at the base.

They're very hardy. I have one (4 years old - roots pruned every other year) in a container & I leave it on a grow bench against an unheated garage 3' off the ground all winter long. I toss a little snow on it if I think it's getting dry. I can't tell you how many times I was asked if it was a Japanese maple.

Al