Cultivars
'Arnold Giant'
This plant produces large yellow flowers that are sparsely arranged on the stems.

'Beatrix Farrand'
This plant produces large bright yellow flowers.

'Lynwood'
This shrub is upright with arching stems that form a vase-habit. During spring masses of rich yellow flowers line the branches. It is planted in cottage gardens where it was first found as a sport og 'Spectabilis' or used in decidious shrub borders.

'Spectabilis'
This fast growing form produces deep yellow flowers.

'Karl Sax'
This dense form has leaves that turn red to purple during autumn and has deep yellow-golden flowers.