Oh wait! They're worth the wait! If I remember correctly, they need shorter days, I think. Mine aren't blooming yet either and this year I planted plugs versus direct seeding, so no noticeable difference (will direct seed next year).

I had blooms all through October - until frost got them!

Hang in there...they're worth it!
Wendy

Last year mine bloomed all summer from the plants I started in my greenhouse and planted out in May. This year they are just the lively greens and no sight of a bud. THe Apricot campus cosmos have been blooming for several months but they are an odd color...not apricot but bronze over mauve. Beautiful with some things but don't hold up well. I won;='t be growing them again. I could be selling buckets of regular cosmos but they didn't grow, along with t he zinnias and suns that didn't grow! I am wonderin if there will be enough sunlight left to produce blooms on the yellows by the time they think they should bloom?

Thank you Wendy and LizaLily for your reply. I will leave them alone and hope for the best. I planted chocolate cosmos for the first time and just picked my first useable bloom last week. this has been the hottest summer on record for us.
Thanks to All

I also just picked my first chocolate cosmos!! What great sturdy stems and they seem to last...I've been testing them before actually offering them to customers. I do hope they winter over well! Did you plant yours from seed or plugs? Just curious...I hope they winter over!!

Wendy

I bought plugs. I thought you have to dig them up and store like tubers, have you heard this??
Bonnie

I'm a big fan of this bloom, too. The company I work for just turned a picture of a yellow cosmos flower into a wallpaper for your computer. I think it turned out great! I'd love to get any feedback you guys have on it.

Here is a link that might be useful: Yellow Cosmos Wallpaper