Hazel nuts are produced from, American Hazel (Corylus americana), Turkish Hazel (Corylus colurna), Filbert (Corylus maxima), Hazel (Corylus avellana) and Chinese Hazel (Corylus chinensis).

They are hardy to zone 4 and flowers from Jan to April, and the nuts ripen from Sept to October. The flowers are pollinated by Wind. The plant is self-fertile. It is noted for attracting wildlife.

The kernels can be eaten raw or roasted. An excellent nut for raw eating.

An easily grown plant, it succeeds in most soils. The main difference between cob nuts and filberts is that the husk of a filbert is longer than the nut and often completely encloses it, whilst the husk on a cob nut is shorter than the nut.