Another C. elata x C. flexuosa hybrid, this one no doubt claiming to be true blue! Fresh green foliage and heads of bright blue flowers in spring. 50cm. Good soil in shade.
Tidy clumps of bright green foliage and heads of scented electric blue flowers to 35cm. Much easier to grow than the usual form of C. elata. Good, leafy, moist soil in shade to do well.