Genus: Filbert

Corylus

Photo/Illustration: 
Michelle Gervais
Filbert (Corylus)
KOR-ih-lus
Betulaceae
Corylus is a genus of a dozen or so species of deciduous shrubs and trees from woodlands in northern temperate regions grown mostly for their foliage and catkins. Some also produce edible nuts. Use in a shrub border or as specimens.
Noteworthy characteristics:  Nice foliage; yellow catkins.
Care:  Plant in full sun or partial shade in fertile, well-drained soil that is preferably alkaline. Remove suckers. Grow plants with colored leaves in full sun.
Propagation: 

Sow newly ripened seed in a seedbed. Cultivars may be grafted in winter or layered in fall.

Problems: 

Bud mites, tent caterpillars, webworms, powdery mildew, blight, canker, dieback, mushroom rot rot, fungal spots, and rust may affect plants.

Species, varieties and clutivars for genus Corylus

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Harry Lauder’s walking stick
Corylus avellana 'Contorta'