For attracting mama buckeyes, I've found dwarf snapdragons work best thanks to Judy Burris/Wayne Richards. I've also found buckeyes on plantain. Some years ago, some 5th graders I taught about caterpillars showed up with a load of buckeye cats they found eating the plantain in their lawn. That is when I started watching the "former" lawn weed. :D

I've only had them on Agalinis plants in the past. My place has enough Agalinis right now to supply a bunch of the cats with enough food. Last year, I had very few plants and the Buckeyes didn't show up to use them at all. So I'm hoping to lure some this way soon.