I bought some setosa
seeds from Parks in S.Car. about 5-6 years ago, a cultivar called "Blue
Lights". It did not bloom until the 3rd year, and has never gotten
any more than 8" tall, if that. (I didn't measure and I'm going by
memory on the height.) It's very small, petite, short-lived flowers, but
it has survived the Iowa winters without any special care.
The color is a delicate pale blue, just
as the catalog and name indicate.