Somei Yoshino (Yoshino Cherry): Identification, Care & Uses
Somei Yoshino (Prunus × yedoensis ‘Somei-yoshino’) is Japan’s most famous flowering cherry and one of the world’s most widely planted ornamental cherries. It is known for its abundant pale pink to white flowers, which appear before the leaves in early spring. This guide is based on observations of the tree as grown in Japan.
What Is Somei Yoshino?
Somei Yoshino is a deciduous tree in the rose family (Rosaceae) and a cultivated hybrid cherry. It is the cherry most commonly associated with hanami in Japan.
The cultivar originated in the Somei area of Edo, present-day Tokyo, where nursery growers are believed to have propagated and sold it under the name Yoshino-zakura in the late Edo period. In 1900, the name Somei Yoshino was formally proposed to distinguish it from the wild cherries of Yoshino in Nara Prefecture.
Overview
| Item | Description |
|---|---|
| Scientific Name | Prunus × yedoensis ‘Somei-yoshino’ |
| Common Names | Somei Yoshino, Yoshino Cherry, Tokyo Cherry |
| Japanese Name | Somei Yoshino (ソメイヨシノ) |
| Family | Rosaceae |
| Origin | Cultivated hybrid developed in Japan |
| Plant Type | Deciduous broadleaf tree |
| Height | About 10–15 m when mature |
| Flowering Season | March–April in Japan |
| Fruit Type | Drupe |
| USDA Zones | 5–8 |
| Sun Exposure | Full Sun |
Characteristics
Flowers
Somei Yoshino flowers in early spring, usually before the leaves emerge. The buds are distinctly pink, while open flowers are pale pink and gradually fade toward white as they age.
The flowers are single, usually with five petals, and about 3–4 cm across. They are borne in clusters and have a delicate fragrance.
Foliage & Autumn Color
The leaves are alternate, elliptic to ovate, and finely serrated, usually measuring about 6–12 cm long. Young leaves emerge shortly after flowering and become dark green during summer.
Fine hairs on the petiole and the veins on the underside can help distinguish Somei Yoshino from some related cherries, although identification should not rely on a single feature.
Autumn color is usually yellow to reddish, but the display varies considerably with weather and tree health.
Fruits
Small, spherical cherries may develop after flowering, particularly when pollination is successful. They ripen from red to dark purple or black in late spring to early summer.
The fruits contain little flesh and are not cultivated as an edible crop.
Bark & Timber
The bark is grayish to reddish-brown and marked by conspicuous horizontal lenticels, a characteristic feature of many cherry trees.
Young trees have relatively smooth bark, while older trunks become rougher with age. The tree develops a stout trunk and broad, spreading branches, eventually forming the familiar rounded or umbrella-like crown.
Size & Growth
Somei Yoshino is a relatively fast-growing ornamental cherry and can reach around 10–15 m in favorable conditions. Its crown becomes broad and spreading with age, so it requires considerable space.
The tree is particularly valued for its abundant spring flowering rather than for fruit production.
Uses & Cultural Significance
Origin & Name
Somei Yoshino was developed in the Somei district of Edo, now part of Toshima, Tokyo. Nursery growers reportedly sold it under the name Yoshino-zakura, invoking the famous cherry blossoms of Mount Yoshino in Nara.
In 1900, Kimei Fujino published the name Somei Yoshino to distinguish the cultivated tree from the wild cherries of Yoshino.
The name therefore combines Somei, the place associated with its cultivation, and Yoshino, the famous cherry-growing region whose name had previously been used for it.
A Clonal Cultivar
Somei Yoshino is propagated vegetatively, mainly by grafting, and the trees produced from the original cultivar are genetically very similar or effectively clonal.
This genetic uniformity contributes to the remarkable synchrony of flowering seen in large plantings. However, flowering is not caused by genetics alone: winter chilling, spring temperature, sunlight, tree health, and local conditions also influence the exact flowering date.
This combination of genetic uniformity and sensitivity to temperature helps produce Japan’s famous sakura zensen, or cherry blossom front.
Origin of the Hybrid
Somei Yoshino is generally regarded as a hybrid derived from Edo Higan (Prunus pendula f. ascendens) and Oshima Cherry (Prunus speciosa).
Modern genetic studies support this parentage, although the precise historical circumstances in which the original hybrid arose remain uncertain.
The hybrid combines traits of both parents: the tendency of Edo Higan to flower before the leaves emerge and the vigorous growth and large, pale flowers associated with Oshima Cherry.
Growing Guide
| Item | Description |
|---|---|
| Sun Exposure | Full Sun |
| Soil | Fertile, well-drained soil |
| USDA Zones | 5–8 |
| Pruning | Keep pruning to a minimum; remove only necessary branches |
Light & Soil
Somei Yoshino grows best in full sun and fertile, well-drained soil. Good air circulation and sufficient space are particularly important because mature trees develop broad crowns.
Cold Hardiness
It is reasonably cold hardy and can be grown across much of temperate Japan. Its flowering time, however, is strongly influenced by winter chilling and spring temperatures.
Pruning
Somei Yoshino should not be subjected to unnecessary heavy pruning. Large cuts can create entry points for wood-decaying fungi and other pathogens.
The traditional Japanese saying sakura kiru baka, ume kiranu baka reflects the long-standing reputation of cherry trees as poor subjects for unnecessary pruning. When pruning is necessary, remove dead, diseased, damaged, or structurally problematic branches rather than repeatedly shortening healthy limbs.
Suitability for Home Gardens
Somei Yoshino can be an excellent specimen tree where there is sufficient space, but it is poorly suited to small gardens or locations where its mature crown must be repeatedly restricted.
Its best use is as a large ornamental tree where the natural spreading form and spring flowering can be appreciated.
Pests & Diseases
Somei Yoshino is susceptible to several pests and diseases affecting cultivated cherries. Cherry witches’ broom and various fungal diseases can become serious problems, particularly in old or poorly maintained trees.
Good air circulation, appropriate planting conditions, and removal of dead or diseased branches can help maintain tree health.
Cultivars
Somei Yoshino itself is a specific cultivar rather than a group of numerous cultivars.
Related forms and selections of Prunus × yedoensis include weeping forms such as Shidare Yoshino, although these should not be treated simply as identical to the standard Somei Yoshino.
Similar Species
| Species | Key Difference |
|---|---|
| Edo Higan (Prunus pendula f. ascendens) | One of the principal parent lineages; exceptionally long-lived |
| Oshima Cherry (Prunus speciosa) | Other principal parent; larger leaves and flowers |
| Yamazakura (Prunus jamasakura) | Leaves usually emerge together with the flowers |
| Kanhi-zakura (Prunus campanulata) | Much deeper pink to red flowers; earlier flowering |
| Oyama-zakura (Prunus sargentii) | Larger flowers and often stronger red autumn color |
| Mame-zakura (Prunus incisa) | Smaller, more compact species |
Frequently Asked Questions
Are all Somei Yoshino trees clones?
Trees propagated from the original Somei Yoshino cultivar are genetically clonal because the cultivar is propagated vegetatively. This genetic uniformity is an important reason for the synchronized flowering of large plantings.
Why do Somei Yoshino flowers turn white?
The buds are pink, but the open flowers are usually much paler. As the flowers age, the pink pigments become less conspicuous, making the tree appear increasingly white at peak bloom.
Can you eat the cherries from Somei Yoshino?
Small fruits may develop, but Somei Yoshino is an ornamental cherry rather than a fruit crop. The fruits are small and contain relatively little edible flesh.
Why does Somei Yoshino bloom so uniformly?
The cultivar is propagated clonally, so its trees have very similar genetic responses to seasonal conditions. Temperature, winter chilling, sunlight, and local microclimate also affect flowering, so the timing is not literally identical everywhere.
How long does a Somei Yoshino tree live?
Somei Yoshino is generally considered shorter-lived than some of its parent species, but there is no single reliable lifespan applicable to every tree. Tree health, site conditions, disease, and management strongly influence longevity.
Why is it called Somei Yoshino?
The name refers to Somei, the Tokyo district where nursery growers propagated and sold the tree, combined with Yoshino, the famous cherry-growing area in Nara whose name had previously been used for the tree.
Conclusion
Somei Yoshino is more than Japan’s most familiar flowering cherry. Its pale spring flowers, broad crown, and synchronized flowering have made it a defining tree of Japanese streets, parks, and hanami.
Developed in Edo-era Tokyo and propagated clonally for generations, it combines the characteristics of two Japanese cherry lineages and has become one of the world’s best-known ornamental cherries.