The Quercus robur 'Fastigiata Koster', commonly known as the Koster Upright Oak, is an elegant and distinctive cultivar of the English oak. This tree is particularly noted for its narrow, upright growth habit, making it an excellent choice for urban landscapes, street planting, and smaller gardens where space is at a premium. The Koster Upright Oak is a deciduous tree, shedding its leaves in the autumn to reveal a striking winter silhouette.

Key features of the Koster Upright Oak include its columnar form, which can reach a mature height of approximately 15-20 meters, with a spread of around 4-6 meters. The leaves are typical of the English oak, being dark green with lobed margins, turning to attractive shades of yellow and brown in the fall before they drop. This tree also produces small acorns, which are a valuable food source for wildlife.

In terms of growing conditions, the Koster Upright Oak is quite adaptable. It thrives in a range of soil types, including clay, loam, and sandy soils, provided they are well-drained. This oak prefers full sun to partial shade, making it versatile for various planting sites. It is also relatively low-maintenance and tolerant of urban pollution, which adds to its appeal as a landscape tree. Overall, the Koster Upright Oak is a robust and visually striking tree that can enhance any garden or urban environment.

Tree Specs

• Common Name: Koster Upright Oak
• Botanical Name: QUERCUS robur ‘Fastigiata Koster’
• Mature Height: 15-20m
• Key Features:
  • Urban
  • Attractive foliage
  • Autumn colour
  • Wildlife friendly