Melon Balls is a nice old cultivar. It's been very reliable for me, over many years. It always puts on a good show in Midseason. It's not the most exciting Daylily but it has a few nice features.
One thing that I like is that the flower goes from a cantaloupe color in the morning to a light rose by evening. Also on hot days, it earns its name by rolling the petals back and presenting itself as ...wait for it...a melon ball!
Some morning pictures
An afternoon pic, you can see the color turning
Flower color by evening
