Very pretty cream margined selection of Box. Grow it as a free standing shrub and don't clip it for the best effect - this also seems to reduce problems increasingly seen with box. 1.2m in 10 years if you're lucky.
Brilliant clumps of bright grey, fine foliage and arching stems of charcoal grey flowers all summer and into autumn. For a well drained soil in full sun, an ideal ornamental grass in a big container too.
New to cultivation in the UK as far as I can tell this autumn flowering species is a showy surprise. Bright, light lavender flowers for many weeks to 75cm.