I was not aware of the actual normal blooming period of daylilies when I posted this thread, and I have just found a study showing what it is. I was amazed to find that the range in the length of bloom time was so large for the different times.
http://www.allamericandaylilie...
"Here’s what we’ve learned in the last 12 years. The average daylily tested will give you two to three weeks of bloom; top performers, on the other hand, will range from 90 days in Zone 4 to nearly 300 days in Zone 9. This is our advice to growers and buyers alike. “Look for a daylily that will bloom for 60% to 90% of the overall bloom period"
