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A picture of a Oak

Oak

Quercus spp.

Quercus-petraea-acorns by Sten (CC BY-SA 3.0)

Full Sun
Easy care
Moderate watering
Frost Hardy

H6-H4

RHS hardiness

-20°C

Minimum temperature

Expected size

Height
Spread

35m

Max

15m

2m

Min

3m

25 years to reach maturity

Flowering

  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

More images

Quercus robur JPG (d1)
A photo of Oak
A photo of Oak
A photo of Oak
A photo of Oak

Overview

Quercus is a large genus with around 600 deciduous or evergreen trees and shrubs, also known as Oaks. These are popular trees for their foliage, growth habit and in some species, attractive autumn colour. Foliage is arranged in spirals and leaves are distinctively lobed, with serrated or smooth edges dependent on species. These species are monoecious, and thus produce male and female flowers on the same individual. Male flowers are yellow and arranged on catkin structures for optimal wind dispersal of pollen to female flowers, which are small and bud-like with feathery, divided stigmas. They are followed by the very distinctive acorns - small, ovoid brown nuts held in scaly half-cup structures. Oak trees are often seen in the countryside in the Northern hemisphere or grown as specimens in large gardens or parks. The foliage and acorns are toxic to dogs.

Common problems

Susceptible to oak wilt in USA

Propagation

Seed

Grafting

Graft in late summer to mid-autumn.

Special Features

Autumn colour

Attractive fruits

Acorns