Geranium, Dwarf Cranesbill, Hardy Geranium, Renard's Cranesbill 'Whiteknights'

This has lavender flowers with darker veins---in this respect, it differs from the most widely cultivated form of this species (which has...Read More white flowers with radiating deep purple veins). Robin Parrer calls it slow growing. http://geraniaceae.com/cgi-bin/detail.py?id=202

Like the species, this has beautiful felted, wrinkled, shallowly-lobed grayish-green foliage that's different from that of most hardy geraniums, with a color and texture that remind me of culinary sage (Salvia officinalis).

Often listed as hardy to Z5.

Requires good drainage, and prefers a lean diet. Native to rocky cliffs in the Caucasus. Armitage calls it tempermental.