seeds for next year

Trumpet Lilies

Marigolds

Petunias

I have NO idea if all of this pod emptying of tiny spheres of black will produce petunias next spring. How do they start petunias? Something to look forward to. My stash of flower seeds for next year has grown from just marigolds last year to some wild flowers, cosmos, these petunias and the trumpet lilies. There are also the usual cast of veggie characters: beans and squash seeds. I'm branching out to more flowers next year.