Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00000817
11/12/99

Kerria japonica--Japanese Kerria


Hardiness Zones: 4 to 9
Height: 5 ft Spread: 8 ft Form: rounded
Type: deciduous shrub
Annual Growth Rate: more than 18 inches
Flowers: Yellow

Comments: Japanese Kerria produces yellow flowers in the
spring and then sporadically throughout the rest of the
summer. The flowers are 1 to 2 inches across. It can
present an unkempt appearance if not pruned. In cold
climates expect some winter injury or failure to flower in
the spring. The stems hold their green color in the
winter so can provide some winter interest. The plant is
considered to be generally easy to grow and so might be
considered for tough sites.

Cultivars:
'Albiflora' - White flowers.
'Golden Guinea' - Large, golden yellow, single flowers
are produced in spring and summer (Vis. 1).
'Picta' - The flowers (Vis. 2) are single but the leaves
have white margins (Vis. 3).
'Pleniflora' - The flowers are double (Vis. 4).
'Shannon' - Large, single, yellow flowers (Vis. 5) are
produced in spring and summer.
'Superba' - Single yellow flowers are produced on
plants that are slightly hardier than the double-
flowered form.

References for Cultivars: Spring Meadow Nursery 1999,
Bailey Nurseries 1999, Lake County Nursery 1997, Weston
Nurseries 1999, Wayside Gardens 1999, Sheridan Nurseries
1999, Studebaker Nurseries 1999, Berryhill Nurseries 1999,
Scarff's Nursery 1999, Gee Farms 1999, Midwest Groundcovers
1999, Willoway Nurseries 1999, Carlton Plants 1999.


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