Quercus roburQuercus robur

  • BOTANICAL NAME: Quercus robur
  • PRONUNCIATION: KWER-kus RO-ber
  • COMMON NAME: English Oak
  • FAMILY: Fagaceae
  • NATIVITY: Europe, northern Africa, western Asia
  • GROWTH HABIT: Broadly rounded open-headed form; 40'-60' (100') tall. Fast growth rate, up to 3' per year.
  • HARDINESS: Zone 4-8
  • CULTURE: Well-drained soil with full sun; pH tolerant.
  • LANDSCAPE USE: Good large shade tree tolerant of city conditions.
  • FOLIAGE: Alternate, simple, 2"-5" long with rounded lobes; obovate, auriculate leaf base with short petiole.
  • BUDS: Imbricately scaled, plump, about 1/4" long. Chestnut- brown.
  • BARK: Dark-brown to almost black, ridged and furrowed.
  • FRUIT: Nut (acorn), elongated to 2" long, involucre (cup covering 1/3 of nut,borne singly or in clusters on a 2"- 5" peduncle.
  • PROPAGATION: Seed; grafted cultivars.
  • PESTS: Mildew, Gypsy Moth
  • CULTIVARS:
    • 'Asplenifolia' - Leaves deeply cut and fernlike. Fine texture.
    • 'Fastigiata' - Upright and columnar.

 

University of Delaware

University of Delaware Botanic GardensNewark, DE 19716Phone: 302 831-0153