Perennial Plant

Question

I have a plant that has green foliage, and every morning tiny flowers open by noon. Then they are gone and next morning they open again. I would like to try to get different colors, if possible, but not sure what the name of this plant could be. The flowers are bluish-purple in color. It is a perrenial and it does seem to spread, gets about 18 inches high.

Answer 1

Without a picture, it is difficult to tell you what plant you have.