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QUERCUS
Commonly known as Oak
Genus of about 530 species of deciduous, semi-evergreen or evergreen trees and shrubs in the beech family widely distributed in woodland and scrub in the northern hemisphere extending to tropical latitudes.
Because of land use changes and climate change many species are under acute threat. In the highlands of Mexico, Central America and the northern Andes forests have been cleared to make coffee plantations and cattle ranching. Pine forests are invading oak in the Indian Himalayas because of temperature rise.
In the UK, Phytopthora ramorum (so-called sudden oak death), a bacterium thought to cause acute oak decline and the oak processionary moth, which causes defoliation, are all modern threats.
Represented in the UK by 2 natives, Sessile or Durmast (Q. petraea), stalked leaves and unstalked acorns and English or Pedunculate (Q. robur) with very short stalks on leaves and long stalks on acorns.
Two other oaks commonly seen are the holm oak (Q. ilex), evergreen, and the Turkey oak (Q. cerris) which was introduced, mistakenly, as a source of good timber.
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Deciduous
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Evergreen
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Semi-evergreenKeeps some of its foliage all year, and will drop some leaves as well.
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TreeSome give excellent autumn colour. Male catkins followed by female acorns
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Full sunEvergreen species prefer full sun
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Partial shade
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Additional FeaturesGood to knowGrown for habit and foliage. Best in parkland or large gardenPests & DiseasesAphids, gall wasps, oak wilt, honey fungus, powdery mildew, bracket fungi.Place of originWidely distributed northern hemisphere
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Soil ConditionsFertile well drained soil
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Toxic - Category CHarmful if eaten(Can be harmful to pets if eaten)
- Introduction
- Hardy evergreen oaks
- More tender evergreen oaks
- Oak species with exceptional leaf colours in spring or autumn
- Uplifting Quercus - Video Tip ondemand_video
- Maintaining variegation - Video Tip ondemand_video
- When is the right time to collect seeds?
- When are seeds actually ripe and ready for collection?
- Magnolia seed collection - Video Tip ondemand_video
- Cornus capitata seed collection - Video Tip ondemand_video
- Lithocarpus Seed Collection - Video Tip ondemand_video
- Camellia seed collection - Video Tip ondemand_video
- Rhododendron seed collecting - Video Tip ondemand_video
- Storing seeds over winter
- Embothrium Collecting and Storing Seeds
- Decaisnea Seed Collection & Potting
- How to plant a tree - Video Tip ondemand_video
- How to plant a tree
- Ties - Video Tip ondemand_video
- Restaking fallen young trees - Video Tip ondemand_video
- Fallen old tree - Video Tip ondemand_video
- Clearing up fallen beech tree - Video Tip ondemand_video
- Spring pruning - Video Tip ondemand_video
- Removing side shoots - Video Tip ondemand_video
- Pruning and Shaping Magnolia - Video Tip ondemand_video
- Deer protection - Video Tip ondemand_video
- Weed Spraying - Video Tip ondemand_video
- Removing Ivy - Video Tip ondemand_video
- Removing wire protection - Video Tip ondemand_video
- Tree Survey - Video Tip ondemand_video
- Crown uplift - Video Tip ondemand_video
- Removing shoots below graft - Video Tip ondemand_video
- Removing peeling bark - Video Tip ondemand_video
- Maintaining variegation - Video Tip ondemand_video
Buy Varieties of QUERCUS

QUERCUS acutissima
oblong chestnut-like leaves which persist into winter

QUERCUS 'Belle d'Aquitaine'
fast-growing hybrid oak. New shoots red and green. Good autumn colour

QUERCUS buckleyi
noted for its excellent autumn colours this newly introduced species is growing well at Caerhays

QUERCUS x bushii 'Seattle Trident'
a magnificent foliage plant with pinkish new growth and glossy dark green leaves.

QUERCUS cerris

QUERCUS coccinea
excellent autumn colour

QUERCUS dentata 'Carl Ferris Miller'
stout shoots and very broad, large, ovate leaves. Rare and fairly slow growing.

QUERCUS dentata 'Sir Harold Hillier'
large green leaves which turn brown in the autumn and hold on the tree all winter

QUERCUS engleriana
small evergreen tree. Leathery narrow leaves with a slender point

QUERCUS ilex
evergreen oak, excellent for windy or coastal conditions

QUERCUS imbricaria
long narrow oval leaves. Rich autumn colours

QUERCUS insignis
this Mexican species produces its attractive pink secondary new growth in the autumn and therefore needs a very sheltered frost free location to get established

QUERCUS laurifolia
rounded tree with long-lasting foliage, bronze when young
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QUERCUS marilandica
slow growing tree with cracked bark and leaves which are yellowish underneath and turn yellow in autumn

QUERCUS mongolica
leaves borne in dense clusters at the ends of the branches

QUERCUS myrsinifolia
small and compact tree with dark green leaves which are paler beneath. Used as a windbreak at Caerhays

QUERCUS phillyreoides
rare evergreen oak with oval leathery glossy green leaves and bronze-tinted new growth

QUERCUS pontica
shrubby or round-headed tree. Stout, reddish shoots

QUERCUS robur

QUERCUS robur 'Concordia'
golden oak - leaves suffused golden yellow in spring and summer

QUERCUS rubra
excellent autumn colour

QUERCUS rubra 'Aurea'
clear golden new leaves which remain yellowish all summer


QUERCUS rhysophylla 'Maya'
a hardy Mexican oak with attractive downy reddish new growth maturing to a bullate glossy green

QUERCUS velutina
very large and irreularly lobed leaves. Reddish-brown and yellowish autumn colour
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