I started some nemophilia seed indoors, which I've never grown before. They are getting big, I guess I started them too early because they are starting to flower. The flowers are so beautiful, a nice blue. I love them, and am wondering why I never see them sold at garden centers. WIll they bloom all summer, or just in the spring? I usually plant blue lobelia, which I love too, for its deep blue color. These are lighter blue, with white centers. Please tell me they'll bloom all summer! It would be helpful to know, as they are going in containers, and I can plant other longer blooming flowers in there with them if they don't keep flowering all summer.