Around here I've seen it taking over vacant lots. Must be pretty invasive. This is not hard to grow, or it wouldn't be on invasive lists.
I grew it once. (the seeds were sold under the name Orlaya Grandiflora, but the same plant I believe). It was very pretty but I didn't let it set seed. I deadheaded it. It's been some years since I grew it, but I wintersowed it and it bloomed the first year.
I thought it was a hardy annual.
Karen
