I was told that the big gardens were impacted the same way mine was last year. It was awful! Bloom season was delayed into May and the weather was still cool then it got hot overnight. The plants aborted a lot of blooms and seemed to be unprepared for the heat. I guess since it was so fast to go from cool to hot, they had trouble adapting. By the end of the summer, the plants looked like they had been run over! If I did not know better, I would have pulled every stinking daylily out and said good bye.
It motivated me to redo all 8 daylily boxes in the late fall and the daylilies are now back on their feet and looking great. This year seems to be the opposite of last yr. Thank heavens! My orders usually come in from November to January. Obviously, this forces me to use FL sellers. I just buy from a few different sellers but usually the plants look good.
Good luck with your late deliveries. Can you pot them up and keep them in the shade?