When pruning to control a plant's size or shape, cuts should be made just above a leaf bud and at a slight angle. Spiraea japonica 'Shirobana'. Spirea japonica 'Shirobana' Overall Description A very interesting, and attractive summer blooming spirea with a handsome, mounding growth habit. Give it a good trim after it flowers in the spring by cutting back the tips of the stems to the top leaf bud. Spiraea spirea is native to China and Japan. Remove 50% to 75% of the top of the shrub maintaining a mounded form. You can also shape the shrub at this time. Zones: 3-8. The dense, compact habit, large clusters of late spring and summer flowers in pink or white, with excellent fall color provides many seasons of care-free enjoyment in the landscape. Rosaceae (Rose Family) flowering shrub flowers leaves and faded flowers. This low-growing mounded spirea shrub is ideal for creating eye-catching borders that provide continual interest. Shirobana spirea, scientifically known as Spiraea japonica 'Shirobana', is a deciduous shrub. Japanese spirea is a favorite of many gardeners, offering a wide range of sizes and cultivars. This spirea variety commonly displays three different colored blooms all on the same shrub - and all at the same time!! Spiraea japonica. This removes the dead blossoms and also may trigger a second blooming and new leaf growth. Spiraea spirea can be pruned by pinching, thinning, shearing or rejuvenating. Location near campus: in center portion of Xeriscape Garden; the Xeriscape Garden is located at the northwest corner of National Avenue and Linwood, about 3/4 mile south of campus. How to Prune Spirea. Bloom time: Early summer through fall. First, use gardening shears to remove any damaged or diseased stems, right back to the base. Pruning Instructions. Spirea Pink (summer blooming), includes A. W., Daphne, Dolchica, Goldflame, Goldmound, Limemoumd, Little Princess, Magic Carpet, Neon Flash, Norman, Shirobana and Japanese White. Spiraea japonica 'Shirobana' Joseph's coat Join the RHS today and get 12 months for the price of 9. Prune these shrubs in early spring before they leaf out. Height and spread: 1 to 2 feet tall, 2 feet wide. Don’t be afraid to really cut the plant back, as these shrubs will grow back even from severe pruning. You should actually prune your spirea more than once a year, at least twice. Join now. Spiraea japonica growth habit Leonora Enking CC-BY-SA 2.0 Spiraea japonica flower and leaf detail Milada CC-BY-SA 2.0 'Neon Flash' Flower Form Jim Robbins CC BY-NC-ND 4.0 'Shirobana' Flower Form Jim Robbins CC BY-NC-ND 4.0 Flower Close-up (Wake County, NC) Cathy Dewitt CC BY 4.0 Form (Wake County,NC) Cathy Dewitt CC BY 4.0 Spiraea Japonica 'Anthony Waterer' left has lovely pale red flowers, compact and upright it grows up to 1m and is fully hardy, illustrated in the first image top left. Japanese spirea (Spiraea japonica), grown in U.S. Department of Agriculture plant hardiness zones 3 through 9, blooms on the year's new growth and must be pruned in late winter or early spring before new growth and buds begin. 'Shirobana' Japanese Spirea. The plant produces white and pink flowers in the summer. Its leaves are green and grow up to 3 inches long. It’s important to prune spirea shrubs, as this helps maintain their shape, prevent diseases, and encourage a second flowering. 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