Oak

Quercus spp.

profile iconQuercus-petraea-acorns
by Sten (CC BY-SA 3.0)
1 of 7
profile iconQuercus-petraea-acorns
by Sten (CC BY-SA 3.0)
1 of 7
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.

Planning

Difficulty

Easy

Flowering time

Summer

Fruiting time

Summer, Autumn

Propagation

Grafting

Graft in late summer to mid-autumn.

Special features

Autumn colour

Attractive fruits

Acorns

Special features

Origin

Northern hemisphere

Environment

Light

Full Sun, Partial Shade, Partial Sun

Soil moisture

Moist

Soil type

Loam, Chalk, Clay, Sand

Soil PH preference

Neutral, Alkaline, Acid

Frost hardiness

Hardy

Personality

Family

Fagaceae

Flower colour

Yellow

Scent

None

Problems

Susceptible to oak wilt in USA

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