Susan, I grow the coral porterweed in my garden, and I've grown the blue, red and purple in the past. All but the red attracted butterflies in a huge way. The red one never grew much, so maybe its small size and few blooms made it less attractive than the others.
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I also grow turk's cap, and butterflies and hummingbirds both love it, especially the sulphurs, gulf frits, and palamedes swallowtails - they're a real magnet for cloudless sulphurs and hummers.
I grew abutilon in a container once, because I'd read it was a big nectar plant for butterflies or hummers, but never saw a single butterfly visiting it, a real bust. If I were you, I'd nix that one!
I've had giant cigar plant in my garden for several years now. When it's in bloom, hummers and butterflies visit it occasionally, but it only blooms in a big way once a year, in late summer/early fall. It made a few blooms in spring last year, so maybe it's like buttonbush - with age, it blooms more often. Mine has to return from the roots every spring, which it's already doing now, and regrow every year, so maybe in a container, it'd bloom earlier and more often, I don't know.
Sherry

The Giant Cigar Plant certainly is a gorgeous plant, too, MissSherry! I had Turk's Cap for one year, but it did not attract anything that I know of. I will try the Coral Porterweed. The Red did attract a lot hummers - they adored it, and I will probably grow it again. The Cloudless Sulphurs, Monarchs, and Gulf Frits also love it as well. I am just looking at different things to change it up a bit.

I will definitely nix the Abutilon! Thanks for your expert advice!

Susan