I have a monarda that I'd love to collect seeds from, but I can't figure out how or when to do that! The plant in question is Raspberry Wine. I'm aware that they may not come true from seed, but that is okay. The hummers love this plant, so I'd like to plant more of them. The flowers are mostly done blooming, with just a rung of bright pink petals left around the bottom of the head. A few are starting to dry out, and no matter how much I shake them, nothing comes out.
Any help would be most appreciated!