Anyone grow Scabiosa from seed? Does it flower the first year from seed?
Yes, most will.
...and then reseed itself and flower the next year...and the next...and...
I think mine went on a good ten years and then didn't show up one year for some reason.
I think it depends on the variety. I have Scabiosa Fama Blue and had Scabiosa Isaac House Hybrids, which did not return the third year. Both were grown from seed and both bloomed the second year. I had grown a couple of not hardy here varieties, a purple one, and Beaujolais Bonnets and both bloomed the same year I planted seeds but did not return.
I also started the yellow variety, ochroleuca. It bloomed the first year and was indeed the gift that keeps on giving - everywhere!
I like Fama Blue a lot. It starts blooming early and blooms until the really cold weather kills the tops. I have several buds on one of mine right now and it's still trying to open them, in spite of having gone through several freezes here already. Mine does need a support system, though, which I plan to use next year.
All that being said, Scabiosa are one of my favorite plants.