It sounds like a perfect place to start one of my favorites, Lupines. The seeds will grow this summer/fall and set a plant about 4/5 inches tall. Next year it will bloom. I started some from seed about 5 years ago, and have had tons of self seeders ever since. And my beds are heavily mulched too. Hey, they just fall between the wood chips, put up little plants, and next year bloom like the wonders they are.
I've also had great luck starting coneflowers, all colors, from seeds. Ask any neighbor for a few seed heads, and scatter them now.
I will send seeds from Lupines if you want. They are still on the plants, but ripening. I will save some just in case anyone wants some.
Pondy

Hi,
Zinnias germinate and grow very fast in full sun. There are so many different varieties and the colors are bright and cheerful. They're one of my favorites.

Hi...I tried to post a reply message here a few minutes ago, but it was rejected. So I'll try again.
I just wanted to thank Pondy for the idea of planting lupine now for next year. And to reply that yes I would love to try some of her lupine seed.
I have sent my address in an e-mail directly to you....I hope that goes through.
Connie

Havent been on the net in ages. But saw your msg, Connie.
I havent gotten an email since June 29th, when I switched servers. Dont know what is wrong. It is now the end of July, and let me tell you, it is still a fine idea to plant Lupine seeds. I noticed some of mine putting out their little first yr plants. In fact, many other biennials would probably work too. Some garden stores (like Steins) still have seeds, and they are heavily discounted. How I wish I could have sent you some of my seeds, cuz I know they are prolific and hardy. My original seeds were Russell hybreds. Good luck. Pondy