How about Silene regia for dry sun, or Silene virginica for a somewhat more shaded section? I haven't grown them myself, and I'm not sure they're as easy as some wildflowers, but I don't think they're difficult. They're definitely hummer flowers. Maybe Monarda punctata or Monarda fistulosa would also be possibilities, but probably require some moisture to do well. Like Monardas in general, I've read that fistulosa can get really ratty looking from mildew, but I don't suppose that matters in a wildflower garden. Maybe someone out there has actually grown the Silenes or Monardas from seed and can give you some first hand advice. From your other plant selections, it sounds like you may be dealing with a sunny, dry place. You didn't say where you live, so it's a little hard to come up with geographically appropriate selections. Another thought is Salvia coccinea. Hummingbirds do visit mine, and although I bought them as plants, I know they are not hard to grow from seed. I'm not sure if they're native to the United States, or further south, but they're definitely appreciated by hummingbirds. I don't know if Easy Wildflowers is a good company, but I found them (and many other wildflower seed suppliers!) through google. Good luck! Here is a link that might be useful: Easy Wildflowers.com

I was afraid of that. It is pretty, but really a threat to the diverse wild flowers one used to see. Still lots of blue bonnets on my drive, but this is disturbing. Hate to see the blue bonnets go the way of the "horny toad" as we used to call them. I miss those guys. Hmmm, maybe a future Eagle Scout project for my life scout? Something needs to be done. Ideas?

I don't know of any specific problems with Potentilla and IME they are easy maintenance. However, I am not fond of Potentilla because I don't find the foliage attractive, the winter branching and silhouette just look twiggy (and that's half my year) and I find the flowers just kind of blah. The overall look of the shrub is quite fine-textured without the grace of a plant like Spirea Ogon (another fine-textured plant), and I don't think Potentilla adds much to most gardens. I particularly want interesting foliage and branch structure in my shrubs and IMO Potentilla don't provide that. Your taste may vary, but to me they are shrubs that speak of commercial landscapes with the emphasis heavily weighed to easy maintenance at the expense of other factors. I like low maintenance but also like to have shrubs that really provide a wow factor at some point during the year, and provide interest much of the year, even during winter. If you give more info about your sun vs. shade and your soil or add some photos, you may get some other suggestions that are easy care and appropriate to your setting but will give your garden more punch. Or you can decide that my opinion isn't worth a hill of beans and go ahead and plant Potentilla if you like it. After all, your garden should give you pleasure. ;>)

I honestly find Morning Glories to be more pesky and invasive and aggressive than Bindweeds. I planted Morning Glories in my garden ONCE over a decade ago and decided I didn't want them in there anymore .... A decade later and I'm STILL getting seedlings popping up. When they grow all over over plants with their big, thick leaves, they can end up killing off those plants by blocking access to light. Bindweed are less of a threat in that regard -- particularly in cold zones -- with their much smaller leaves. In my experience, Morning Glories are far more aggressive and grow to far greater lengths than their wild cousins. Their flowers may be prettier, but their growth habits are a pain to deal with -- the one I had covered a 25ft. area even with constant pruning of new growth & was a nightmare to remove in autumn after frost killed it off and it looked all ugly.