6-9" x 18" wide (cutting propagated) 'Single Yellow' has been a star performer in our gardens with individual plants going on ten years old! They never fail to smother themselves with bright yellow flowers and tolerate the worst of our weather. Deep rooted with evergreen foliage, this little sub-shrub needs only occasional deep soakings and shrugs off the alkalinity in our soil. Shear back after flowering for light repeat blooming later in the summer. Zones 4-9.