I had the same problem with mine. I moved it to a spot where there were lots of other flowering plants, and it seemed to do better. My idea was that maybe it is just not as attractive to pollinators as other plants unless it was just handy. I have the white one, blushing suzie, sunrise surprise & the regular. The white & blushing suzie have gone on to make seeds, Sunrise surprise which is off by inself has never made seeds. By the way, I kept one inside last winter, it does nicely in a sunny window & will bloom all winter.

I grew it for the first time last summer. What a fun plant! It was a nonstop bloomer.

Those seeds are hard to spot so you may have just missed them. I had to really hunt to find any.

I have a 12 year old black eyed Susan vine I planted from seed, but never tried to collect seeds from it. How would I find them? What do they look like? Are they tiny? On what part of the plants and what time of year would I try and harvest them? I live in Lakeland, Florida. Mine are a yellowy pumpkin color with black centers. They're blooming over a trellis right now. Winter hasn't gotten to them yet.
Thanks, Cheryl

Cheryl,
Maybe this will help you a little, found it while researching :-)

http://forums.gardenweb.com/forums/load/seedsave/msg1001280012270.html?4