I have planted several rows of Lillies this year. I bought them as "assorted Daylillies", or "Asst Naturalizing Daylillies". They were described to produce bicolored blooms for months from spring to fall. Anywho, they are in the ground in full sun, prob 7+ hours a day in a perinnial bed I startd this year. The lillies are now starting to bloom, some of them sooner than others. One in particular is gorgeous, huge pink and yellow bicolor blooms arout 2.5 feet tall. My question is, why does the bloom explode with color and size, then shrivel up the next day and fall off? I thought daylillie blooms lasted for a long time? Is this normal, or am I doing something wrong? They sure are pretty, but I'd hate to think that each bloom only last for about 24 hours? Any tips/advice/info would be appreciated. thanks