Stephanandra tanakae, commonly called Japanese stephanandra or tanaka stephanandra, is a deciduous shrub native to the hills and alpine slopes of Japan. This sprawling 8 to 10-foot tall shrub earns its place in the garden through a combination of ornamental qualities: bright green lobed foliage that transforms to striking yellow-orange in fall, ruddy winter stems that provide color during dormant months, and showy flowers and fruit that extend seasonal interest. Hardy in zones 5 through 7, it thrives in full sun to partial shade and prefers moist, well-drained, acidic soils. Its arching branches and vigorous, spreading habit make it excellent for naturalizing in landscapes where it can spread freely.
Partial Sun
Moderate
5-7
120in H x 120in W
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High
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Japanese stephanandra's greatest strength lies in its year-round visual presence. The sharply lobed, bright green leaves provide fine textural interest throughout the growing season, then ignite into yellow-orange come autumn. Even after the leaves drop, ruddy red stems carry the ornamental show through winter's gray months. The entangled branching pattern creates an impenetrable, attractive mounding form that softens garden edges and adds structure without formal pruning.
Stephanandra tanakae serves primarily as an ornamental shrub for naturalized woodland edges, slope stabilization, and informal hedging. Its ability to control erosion through its spreading, rooting stems makes it valuable for banks and disturbed areas. In landscape design, it functions as a textural backdrop or specimen shrub where its arching form and seasonal color shifts can be appreciated from multiple angles.
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Prune Stephanandra tanakae immediately after flowering in June to thin stems and maintain shape. The plant's naturally entangled branching habit often makes pruning difficult, so avoid attempting heavy shaping. If the shrub becomes overgrown or loses vigor, mature plants respond well to hard pruning back to the base in late winter, which encourages vigorous renewal growth.
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“Stephanandra tanakae hails from the mountainous regions of Japan, where it evolved in alpine slopes and hillside communities. Its journey to Western gardens reflects the broader 19th and early 20th-century enthusiasm for Japanese plants, particularly those exhibiting both architectural form and seasonal color variation. Named after the Tanaka family, this species represents Japan's rich horticultural heritage and the plant explorer tradition that brought Asian genera into global cultivation.”