Kerria japonica
'Golden Guinea'
Japanese Rose
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Golden Guinea is a weaker cultivar of Kerria japonica that might be a little problematic to grow in Ontario gardens. Nonetheless, it is an interesting plant if grown in a grouping, where its bicoloured flowers will produce a substantial show.
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Family |
Rosaceae |
Genus |
Kerria |
Species |
japonica |
Cultivar |
'Golden Guinea' |
Category |
Woody |
Type |
Shrub (deciduous) |
Pronunciation |
USDA Hardiness Zone |
5 – 8 |
Canadian Hardiness Zone |
6 |
RHS Hardiness Zone |
H7 - H4 |
Temperature (°C) |
-32 |
Temperature (°F) |
-25 |
Height |
1 – 2 m |
Spread |
1 – 3 m |
General Description |
Loosely mounded plant with numerous slender, zigzagging branches that emerge at ground level. Yellow cream flowers and colourful green stems make an attractive plant. |
Cultivation |
Tolerates any soil type, grows well in shady corners and when soil moisture is adequate. |
Shape |
Loosely arching form. |
Growth |
Medium |
ID Characteristic |
Smooth, uniformly green stems, buds are dark and contrast with the stem, the stems have a zigzag pattern of growth to them. Flower is semi–double and turns from yellow to cream. |
Pests |
Leaf and twig blight, leaf spot, canker, root rot. |
Habitat |
Horticultural origin. |
Bark/Stem Description |
A green colour during the growing season, but turning yellow–green in winter. |
Flower/Leaf Bud Description |
Green-brown or coloured varied, usually 5 exposed scales. |
Leaf Description |
Simple, alternate leaves, ovate to lance-shaped, bright green colour. |
Flower Description |
Bright yellow, 3.8 cm across, 5 petaled, in full sun the colour fades to a bleached yellow or cream. |
Fruit Description |
Achene, seldom seen, not very showy. |
Colour Description |
Stems are distinct yellowish green to bright green in winter, otherwise a rich clear green. Leaves are a light green while flowers are a cream–yellow mix. |
Texture Description |
Fine in winter and smooth. |
Propagation |
Through cuttings in late spring to early summer. |