The Hazel nut or Filbert is a really lovely tree for both its ornamental value as well as its cullinary use. Large brown hazel nuts are borne during the autumn months. A long fruited variety with a long 'beard'. Height 3-5 metres (12-15') Filberts take their name from St Philibert's Day on 20 August, the date when hazelnuts were supposed to start ripen. Holy Cross Day on 14 September was traditionally given as a school holiday for children to go nutting, a custom which persisted in England until the First World War.