Jan - I have read that some daylilies are more winter tolerant and others are more heat tolerant. I don't know what the real difference is. I just know that some daylilies were specifically created for northern gardens and others for southern gardens. Probably east and west gardens as well.
Wow, Ed! You have some really gorgeous daylilies crosses.
I noticed that you label yours by letters and numbers. You seem to have the parentage for most of your crosses. Did you acquire the original registered plants or purchase hybrid seeds to grow your stock plants from which you have been creating your own hybrids? Purchasing the actual fans is way out of my price range. I grow my garden on a limited budget.
I had never seen the Lily Auction until recently and I was blown away! Amazing what some of those seeds go for! Looks like your hobby could pay for itself!
Just curious .... how big is your daylily garden? A thousand daylilies is a LOT!!!