Quercus rubra

Quercus rubra

  • BOTANICAL NAME: Quercus rubra
  • PRONUNCIATION: KWER-kus RU-bra
  • COMMON NAME: Red Oak
  • FAMILY: Fagaceae
  • NATIVITY: Canada, eastern to midwestern U.S.
  • GROWTH HABIT: Rounded, 60'-75' (100') tall x 40'-50' wide. Fast growth rate, up to 2' per year.
  • HARDINESS: Zone 4-8
  • CULTURE: Sandy loam, acid soils in full sun.
  • SUCCESSIONAL STATUS:  Climax
  • FACULTATIVE STATUS:  Facultative
  • LANDSCAPE USE: Sturdy street tree tolerant of urban pollution; develops chlorosis in high pH soils. Easy to transplant.
  • FOLIAGE: Alternate, simple, 4"-8" long, 7-11 pointed lobes with shallow sinuses compared to Q. palustris and Q. coccinea. Emerge reddish, become dark-green in summer, turn variable reds in fall.
  • BUDS: Chestnut-brown, 1/6" - 1/3", sharply pointed.
  • BARK: Steel-gray with ridges and furrows, often mingled with flattened gray areas on the larger branches and main trunk.
  • FRUIT: Nut (acorn) ¾" - 1" long with involucre (cup) covering about ¼ of nut.
  • PROPAGATION: Seed; hybridizes freely.
  • PESTS: Gypsy moth.
  • CULTIVARS:
University of Delaware

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