Cork Oak Tree
The famed Cork Oak Tree of the Mediterranean is one of the most iconic species of that region and is the national tree of Portugal. The outer bark from the Cork Oak is harvested every 7 years or so to produce corks for bottling wine and other beverages. A stunning specimen plant in the urban or rural landscape, this broadleaf evergreen is long lived and very climate appropriate for our region, being well adapted to areas with dry summers and wet, mild winters. Acorns from the Cork Oak are quite large and absolutely adored by pigs. An excellent silvopasture tree.
Latin Name: Quercus suber
Site and Soil: Cork Oaks like 1/2 day to full sun and well-drained soil.
Pollination Requirements: Self-fertile. Will freely hybridize with other Quercus species planted nearby
Hardiness: Cork Oak Tree is hardy to 0º F.
Bearing Age: 4-5 years after planting.
Size at Maturity: 70-100 ft.
Bloom Time: June
Ripening Time: October
Yield: 100+ lbs.
Pests & Diseases: Sudden Oak Death can be an issue for Quercus species in Southwest Oregon and California but so far we have not seen it affecting the cork oak or oaks in the Portland Metro area
USDA Zone: 7