We are very dry here, and if anything the challenge is getting the daylilies enough water to bloom well (reasonable scape height and branching, appropriate bloom size, buds not drying and falling off, blooms opening properly). This year I was neglectful of some pots, with the result that most of the nascent flower buds just dried up.
As a test-of-concept, one thing that I did for my seedlings this past year was to pot them in 8" tree pots, then put those pots into one of those under-the-bed plastic storage bins. The bin always had water in it, usually almost to the brim of the storage box (which was at least a couple inches below where the plant crowns would be). All of the seedlings bloomed with what appeared to be appropriate bloom sizes and scape heights (expected for the cross), and the flowers opened well (again, depending on genetics). It worked well enough that I think I am going to grow all of my seedlings that way now - the pots are large enough for the plants to get to bloom, and the bin keeps all of the plants hydrated (and for all I know, cools the black pots down some). The challenge there is appropriate fertilizing; I have had to switch to liquid fertilizer over the whole bin. (When first planted I put time-release fertilizer into each pot, but as they grow, those pots are so close together that getting down into the foliage to renew the time-release fertilizer is just a hassle.) That, plus I have to treat for mosquitoes.
