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Ware’s oak results from a cross between a cultivar of English oak (Quercus robur ‘Fastigiata’) and Swamp white oak (Quercus bicolor). The resulting hybrid has a columnar form, good fall color and resistance to powdery mildew.

  • Family (English) Beech
  • Family (botanic) Fagaceae
  • Planting site City parkway, Residential and parks, Wide median
  • Tree or plant type Tree
  • Foliage Deciduous (seasonally loses leaves)
  • Native locale Non-native
  • Size range Large tree (more than 40 feet), Medium tree (25-40 feet)
  • Mature height 30-45 feet
  • Mature width 20-25 feet
  • Light exposure Full sun (6 hrs direct light daily)
  • Hardiness zones Zone 4, Zone 5 (Chicago), Zone 6, Zone 7, Zone 8, Zone 9
  • Soil preference Acid soil, Moist, well-drained soil
  • Tolerances Alkaline soil, Dry sites, Occasional drought, Wet sites
  • Season of interest late fall, mid fall
  • Flower color and fragrance Inconspicuous
  • Shape or form Columnar
  • Growth rate Fast
  • Transplants well Yes
  • Planting considerations May be difficult to find in nurseries, Messy fruit/plant parts
  • Wildlife Migrant birds, Small mammals, Songbirds
  • Has cultivars Yes

Native geographic location and habitat: 

Ware’s oak is of hybrid origin.

Bark color and texture: 

The bark is dark brown, ridged and furrowed.

Leaf or needle arrangement, size, shape, and texture: 

The alternate, simple leaves have rounded lobes. They are dark green in summer, changing to yellow-brown in fall.

Flower arrangement, shape, and size: 

The inconspicuous male and female flowers are on the same plant, but in separate structures.

Fruit, cone, nut, and seed descriptions: 

The 1 inch long oval acorns are borne on stalks that are 1 to 3 inches long.

Plant care: 

Prune oaks in the dormant season to avoid attracting beetles that may carry oak wilt.

List of pests, diseases, and tolerances: 

Anthracnose, oak wilt, scale, galls and leaf miners are potential problems on Ware’s oak. It is resistant to powdery mildew and borers. It is resistant to damage from ice and wind.

Kindred Spirit® Ware’s Oak (Quercus x warei ‘Nadler’): 

A columnar cultivar, growing 40 feet high by 6 feet wide with red-orange fall color. It is resistant to drought and powdery mildew.

Regal Prince® Ware’s Oak (Quercus x warei ‘Long’):

A cultivar with a narrow habit (45 feet high and 20 to 25 feet wide). It has excellent resistance to borers and powdery mildew. The fall color is yellow.

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