Draba arabisans

A delightful and rare little cress from crags and ledges of the far northern U.S. and Canada, Draba arabisans does well in lowland gardens south of its range, forming clusters of whorled rosettes topped by sprays of white flowers from late spring into summer.  Rock garden conditions or the equivalent are best, with shade from hot midday sun.  Raised from seed.  3.5-inch pots.  Zone 2.  Photo: Michael Wolf

Sun to light shade; porous soil; 8"x8"; late spring to summer