Corylus sieboldiana var. mandshurica, commonly known as Manchurian Filbert, Manchurian Hazelnut, or Siebold’s Hazelnut, is a deciduous shrub native to temperate mixed forests and woodland areas in East Asia, including China, Japan, and Korea. This species typically grows at a moderate rate to a height and width of 6-9 feet (1.8-2.7 meters). It features broadly ovate leaves and bears inconspicuous monoecious flowers, with male catkins being yellow and pendulous and female flowers being tiny and red, blooming in early spring. The flowers are not particularly showy, but the shrub is valued for its edible nuts that mature in the fall. The bark is smooth and gray, and the nuts are encased in a husk with a fringed edge.

Manchurian Filbert is appreciated for its nuts, which are harvested for culinary use, and its ability to adapt to various soil types, making it a versatile choice for home gardens and agricultural production. It is also used in naturalized plantings and as a wildlife attractant. The shrub thrives in full sun to part shade and prefers medium or fast-draining clay, loam, or sandy soils. It requires medium amounts of water and benefits from mulching to maintain soil moisture. While generally low-maintenance, it can be susceptible to Eastern Filbert Blight and nut weevils. Gardeners should be aware of these potential issues and monitor for signs of disease or pests.CC BY-SA 4.0