Karl Sax is an upright, deciduous shrub with graceful, arching branches with ovate shaped foliage and serrations on the lower edges. Produces deep, bright yellow flowers that are borne in groups of 2 or 3 appearing in early spring. Needs free-draining soil in either full sun or partially shaded.Easy to grow and requiring little maintenance. Flowers appear before the foliage. Grows to between 2m and 2.5m.