I am confused on this one. Hopefully someone that is on this forum can clear it up for me. Three points I have questions on.

1. I see on different sites the color of the bloom varies from white, blue and even purple in color. Why the different color of blooms reported for the same cultiver? (no single site I have found reports more than one color bloom)

2. Light requirements vary drastically also. From full sun to full shade. No one site I have seen yet says it can grow in that vast range of lighting. What type of Sun requirements does it truly have?

3. Hardiness. I've seen it reported as zone 6 being the lowest, 5 and even 4 being the lowest. How Hardy is this cultiver truly?

Leaves me wondering, Are there really 3 (or more) cultivers lumped into one cultiver name?

I would appreciate all help in understanding this