Kerria japonica 'Pleniflora'
Japanese Rose
 
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Family: Rose family (Rosaceae)
Native Habitat: China and Japan

General Kerria japonica info:
Kerria is a bright and cheerful shrub that's an excellent choice for shady areas. The large, 1¼ to 1¾", five-petaled, rose-like flowers are borne profusely in April and early May. The bright-green foliage is attractive all season and can really brighten up a shady area. However, it shows little or no fall color. The bright-green, twiggy, zigzag stems are really unique and are an attractive bonus, especially in winter.

This is a shrub that is quite effective when in flower. The bright-green leaves are a great foil for the shining flowers. After a long winter, we're always cheered when the Kerrias in our garden begin their show in April.

This variety:
If what you want from a Kerria is maximum flower power, than 'Pleniflora' is the variety for you. The fully- doubled, golden-yellow flowers are ball-shaped and will measure up to 2 in. in diameter. When in full bloom the quantity of flowers can nearly obscure the foliage. Its bloom period lasts an extra long time in spring and it will continue to flower intermittently through summer and into fall. In fact, flowering will pick up again in fall as temperatures cool. Its form is different from other varieties. It grows more erectly and can reach 8 ft. in height.

Ornamental Characteristics:
Bright-green serrated leaves up to 4" long. Leafs out quite early in spring. Little or no fall color. Large, double, sunny-yellow, 5-petaled, rose-like flowers in early spring. Will bloom intermittently all season. Very showy when in flower. Bright-green stems that are especially attractive in winter.
Habit & Growth Rate:
Dense, twiggy deciduous shrub. Erect form can grow to6 to 8 ft. tall and nearly as wide. Can easily be pruned smaller. Will slowly sucker to form larger colonies. Medium to fast grower.
Landscape Uses:
Masses, shrub border, foundation plantings, informal hedge. Deer resistant.
Hardiness: Zone 5 to 9
Culture:
Best in light to full shade. Flowers will bleach out in full sun. Does well in most soils except poorly drained ones. Easy grower.