Hi Loretta,
"You think it's not too late to try a few? Maybe they will bloom by end of September but probably no seeds? "
Zinnias bloom in 6 to 8 weeks and can set green seed in 3 to 4 weeks, so provided that you use the technique of saving green seeds instead of waiting for the flower head to turn brown, then yes, I think it is not too late to try a few zinnias.
I will continue to plant some zinnias for the next 2 weeks here in east central Kansas. Although I did start planting some zinnias outdoors late in April and I have some of those zinnias coming into bloom now. My zinnia gardening is a kind of multi-tasking affair.
ZM
