![]() Golden spring foliage color gives way to chartreuse-green if plants are sited in part shade conditions. Narrow, linear-lanceolate, sparsely-toothed leaves (to 1.5" long) emerge golden yellow in spring, mature to bright green in summer and finally turn interesting shades of orange in fall. Specific epithet honors Carl Peter Thunberg (1743-1828), Swedish plant explorer, who introduced this plant to Europe. Narrow, linear-lanceolate, sparsely-toothed leaves (to 1.5 long) emerge golden yellow in spring, mature to bright green in. Leaves are light green by summer, going from gold to purple in autumn. Narrow leaves, almost 50cm long, emerge yellow in spring. Genus name comes from the Greek word speira meaning wreath in reference to the showy flower clusters seen on most shrubs in the genus. Spiraea thunbergii Mellow Yellow (Ogon) Small white flowers line the branches in spring, upstaging the leaves Narrow leaves, almost 50cm long, emerge yellow. Spiraea thunbergii 'Mellow Yellow' (Ogon) Small white flowers line the branches in spring, upstaging the leaves. Foliage turns an undistinguished yellow in fall, but is sometimes tinged with interesting orange and bronze hues. Narrow, linear-lanceolate, sparsely-toothed, pale green leaves (to 1.5” long and to 1/4” wide) have a willow-like appearance. It lends an extremely fine and delicate texture to the landscape composition which can make it a great accent feature on this basis alone. It is particularly noted for its early spring bloom (April before the foliage) of tiny white flowers (each to 1/3” diameter) in 3- to 5-flowered umbulate clusters. Mellow Yellow Spirea is a multi-stemmed deciduous shrub with a shapely form and gracefully arching branches. It typically grows 3-5’ tall and as wide, often becoming somewhat open and leggy over time. I'm not a big fan of shearing, but that's what I do to spireas. Spiraea thunbergii, called Thunberg spirea, baby’s breath spirea or breath of spring spirea, is a dense, twiggy, upright, deciduous shrub with wiry, outward-arching branching. 'Mellow Yellow' normally flowers in late March to early April, so mid-April is prime pruning time. ![]()
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