You cannot give Daylilies too much water!! A deep watering is always better than shallow ones, In other words, water for at least an hour when you water. if you want to see good bud formation and more re bloom, water well 3-4 times weekly. Some friends with top notch display gardens water everything daily for an hour, but that can get expensive. I am seeing great bloom and a lot of re bloom scapes, and it is directly correlated to the fact that I've been pouring thewater to them!!
