Spiraea japonica 'Walluf'
Botanical Information
| Family | Rosaceae |
| Genus | Spiraea |
| Species | japonica |
| Cultivar | 'Walluf' |
| Category | Woody |
| Type | Shrub (deciduous) |
Details
| USDA Hardiness Zone | 6 |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 6 - 7 |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H6 |
| RHS Hardiness Ref. | |
| Temperature (°C) | (-20) - (-15) |
| Temperature (°F) | 4 - 5 |
| Height | 1.5 - 2 m |
| Spread | 1.5 - 2 m |
| Growth | Medium |
| Flowering Period | June, July |
Description and Growing Information
| General Description | S. japonica 'Walluf' is an upright deciduous shrub growing to approximately 2 m tall and 2 m wide. During the midsummer the flattened headed flowers bloom in large clusters of bright pink |
| Propagation | Propagate during the spring via semi-ripe or softwood cuttings. Additionally, propagation by hardwood cuttings is viable but should be done during the winter. |
| Cultivation | S. japonica prefers full sun but is tolerant of partial shade. It prefers plenty of water during the growing season though caution should be taken as it cannot tolerate saturated soils for extended periods of time. It prefers a rich, moist loam, but it can grow in a wide variety of soils, including those on the alkaline side. |
| Pests | Susceptible to Powdery mildews. |
| Notable Specimens | Wakehurst Place, Ardingly, Haywards Heath, Sussex. |
| Habitat | Horticultural origin. |
| Leaf Description | Leaves are generally an ovate shape about 2.5 cm to 7.5 cm long, have toothed margins, and alternate along the stem. |
| Flower Description | Clusters of rosy-pink flowers are found at the tips of the branches. |
Photographs
Spiraea japonica 'Walluf' form. Wakehurst Place, Wakehurst Place, Ardingly, Haywards Heath, Sussex. 19/11/2019.
Spiraea japonica 'Walluf' leaf. Wakehurst Place, Wakehurst Place, Ardingly, Haywards Heath, Sussex. 19/11/2019.
Spiraea japonica 'Walluf' flower. Wakehurst Place, Wakehurst Place, Ardingly, Haywards Heath, Sussex. 19/11/2019.