Oh dear, another addictive family of hardy herbaceous perennials! Lots of unusual species to choose from and some new breeding between them. Mostly tight clump formers with airy upright flowers in summer.
An outstanding species, dioecious and variable but always really pretty! Purplish stems and well-divided leaflets to about 30cm and taller stems topped with heads of fluffy white/pink flowers from mid-summer. Clump forming and quite slow. Good soil in sun or part shade. 50cm.