Daylilys can funny things at times. Three years ago Always Afternoon put on a real show for me and the next year i thought it was dying out because it down to small fans. I then moved it to a less than ideal spot on the side of the house and this year it made a great comeback with many blooms.
Last year Chicago Apache was small ,short and anemic so i moved it to partial shade. This year it is bigger and taller then i have ever seen this plant get with strong scapes and a multitude of large blooms. Go figure. If something does not work try something else is my maxim.
Sometimes it really is location,location,location.