Goldenrod in my garden, or no?

I love how goldenrod blooms look like fireworks at the very end of summer and I think they'd be perfect for standing behind a row of irises and coneflowers in my garden bed. (The irises aren't native, they were a gift from my aunt)

I'd love a really tall, really late season bloom in that bed.

But I can't find goldenrod plants or seeds in any online store, and I figure there must be a reason for that. Too much of a weed? Not good for cultivation? I don't know. It makes me look for alternatives, but I can't think of any. And it means the only way to get seeds is to collect them in the fall.

Am I missing something? Any thoughts?

Don't know how to edit flair but I'm in New Jersey.