They might appear locally at Costco and big box stores in late August/September. Some reputable online sellers accept orders for fall shipping now. Check out

Brent&Becky's

Touch of Nature

High Country Gardens

Thanks so much, Alina!!! Christy :)

I ordered mine last year from McClure&Zimmer. They have a neat catalog.

Thanks Beth :) I did a google search for McClure & Zimmer. Nothing came up. Any ideas? Thanks :) Christy

Cristy,
I think Beth meant McClure&Zimmerman. I received their new catalog yesterday. I was going to mention them today :-)
They do have nice selection of fall blooming Crocus and Colchicums. I do not like their catalog though: all pictures are black/white.
Good luck!

Hey Christy, I hope you didn't buy any fall crocus yet because my Mom has lots of them to give you. Also she has magic lilies/naked ladies if you'd like those too. She's in Rockville. Why don't you email her at vicki dot e dot b at comcast dot net.

Thanks collectordi! I'll do just that :) I haven't bought any yet, I've had company in town all week, not much chance to get online :)