Diane,
Like you, I love blue flowers and have grown nolana Bluebird in the past - this is, i think, described as a half-hardy annual in UK seed catalogues and makes a nice flower for summer tubs and baskets. It never overwintered for me, even when I lived in the south of England. I have never tried any of the Chileflora species, oh dear, I can feel a new seed order coming on.....