Flowers are grown by me, in a Leadville CO! The glass used to make these pieces are old broken windows or glass from old picture frames. I’m a big believer in upcycling and make something beautiful out of old discarded items. I use a lead free solder. 
While I use the stained glass method, these art pieces are more for wall hangings then they are for hanging in the window. If you hang them in the window that gets direct sunlight the petals will fade.