{"slug":"corylus-avellana","scientific_name":"Corylus avellana","common_names":["Hazel","Common hazel","Cobnut"],"family":"Betulaceae","type":"broadleaf_deciduous","mature_height_m":8,"mature_spread_m":6,"growth_rate":"medium","lifespan_years":80,"hardiness_zones":[4,8],"sun":"full_partial","water":"medium","soil":"Most moist but drained soils including chalk and clay; tolerates shade under oak","native_range":"Native across Europe from Britain and Ireland to Scandinavia, Russia, Türkiye and the Caucasus; also the Faroes.","description":"A multi-stemmed small tree or large shrub to about 8 m (occasionally 12 m) with yellow catkins in late winter and edible nuts in autumn. Hazel is the classic coppice plant of British woodland and a staple of hedgerows, giving pea sticks, bean poles and hurdles while feeding dormice, woodpeckers and jays. Coppiced plants can live for several hundred years.","care":"Plant bare-root whips in winter; it needs little aftercare beyond weed control and protection from deer and rabbits. Coppice every 7 to 10 years in winter if you want rods and a dense understorey. Few serious pests; squirrels take most nuts before they ripen.","benefits":["wildlife","edible","pollinators","birds","small_space","long_lived"],"uses":["hedgerow","small_yard","food","screening","reforestation"],"cautions":["allergenic_pollen"],"image_url":"https://upload.wikimedia.org/wikipedia/commons/6/60/Corylus_avellana.jpg","image_credit":"Wikimedia Commons, file Corylus_avellana.jpg (see file page for author and licence)","sources":["https://www.woodlandtrust.org.uk/trees-woods-and-wildlife/british-trees/a-z-of-british-trees/hazel/","https://www.gbif.org/species/2875979","https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=277826","https://plants.ces.ncsu.edu/plants/corylus-avellana/"],"data_note":null,"updated_at":"2026-11-08T01:00:46.205Z","page_url":"https://treerm.org/trees/corylus-avellana","markdown_url":"https://treerm.org/trees/corylus-avellana.md","regions":[{"country":"DE","region":null,"locality":null,"status":"native","note":null,"source_url":"https://www.gbif.org/species/2875979"},{"country":"FR","region":null,"locality":null,"status":"native","note":null,"source_url":"https://www.gbif.org/species/2875979"},{"country":"GB","region":null,"locality":null,"status":"native","note":null,"source_url":"https://www.woodlandtrust.org.uk/trees-woods-and-wildlife/british-trees/a-z-of-british-trees/hazel/"},{"country":"IE","region":null,"locality":null,"status":"native","note":null,"source_url":"https://www.gbif.org/species/2875979"},{"country":"NO","region":null,"locality":null,"status":"native","note":null,"source_url":"https://www.gbif.org/species/2875979"}],"license":"CC-BY-4.0"}