Here is one of the few sources I found.

Here is a link that might be useful: Prairie Moon Nursery

Here is another.

Here is a link that might be useful: Easy Wildflowers

Thanks for the help flutterbug.

Your welcome, I was thinking about trying them myself, so I had the links in my favorites. I see them growing wild around here, but always thought of them as a weed. Until I found out hummers like them!

I've been looking for some of these seeds as well. I think they're easy to collect seeds from, I just haven't seen a plant! Thanks for the info flutterbug. Christy

Jewelweed plants grow wild by me. They are also called Touch Me Not, because when you touch the seed pods, they explode and throw the seeds out. Great fun for the kids in September!