It seems that there are tall daylilies, and then there are tall daylilies.
I've grown Curt Hanson's Notify Ground Crew for about 6 years, and in a 5 gallon container, it consistently bloomed around 30". This year, after planting in the ground last fall, it hit 48" easily.
Owens' Eminent Domain has spent two seasons in the ground at the foot of a brick wall, and is consistently 10-12" tall. I'm almost positive that the soil there has a problem, and the plant will be moved. I've read from more than one source that the giants take a couple of years to settle in and show their stuff, but it is what it is.
Sears Tower, on the other hand, planted in a 5 gallon container right next to Notify Ground Crew, reached 44" in its first season, and backed up its performance this year, even though the fans are on the small side. It's easily pod-fertile, and the scapes are slender, but well-anchored.
