I hate to tell you this but brugs do not have seed. Daturas do and a lot of people get them mixed up as the same, but they are not the same. The brugs are called angel trumpets( cause the bloom hangs down) and the daturas are called devils trumpets(because the blooms stick up). Brugs have to come from cuttings. I will have some yellow later in the fall that I would be glad to share with you if you will remind me.

Hi,
Just wanted to say that brugs Do have seeds.
I will have some cuttings in the fall also, just email me
then.
Thanks,
Karen

I realize the original post is an older one, but I'd be happy to send you some of my brugmansia Single White and Canary Bird seeds. Not easy to grow from seeds, but you're welcome to try.