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Ware's oak

Ware's oak has a narrow form.

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.

This plant has some cultivated varieties. Go to list of cultivars.

Botanical name:

Quercus warei

All Common Names:

Ware's oak

Family (English):

Beech

Family (Botanic):

Fagaceae

Planting Site:

  • Residential and parks,
  • City parkway,
  • Wide median

Tree or Plant Type:

  • Tree

Foliage:

  • Deciduous (seasonally loses leaves)

Native Locale:

  • Non-native

Landscape Uses:

  • Parkway/street,
  • Shade tree,
  • Specimen

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:

  • Dry sites,
  • Occasional drought,
  • Wet sites,
  • Alkaline soil

Acid Soils:

  • Prefers

Alkaline Soils:

  • Moderately Tolerant

Salt Spray:

  • Intolerant

Soil Salt:

  • Intolerant

Drought Conditions:

  • Tolerant

Poor Drainage:

  • Moderately Tolerant

Planting Considerations:

  • May be difficult to find in nurseries,
  • Messy fruit/plant parts

Ornamental Interest:

  • Fall color

Season of Interest:

  • Mid fall,
  • Late fall

Flower Color & Fragrance:

  • Inconspicuous

Shape or Form:

  • Columnar

Growth Rate:

  • Fast

Transplants Well:

  • Yes

Wildlife:

  • Migrant birds,
  • Small mammals,
  • Songbirds

More Information:

Tree & Plant Care

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

Disease, pests, and problems

Anthracnose, oak wilt, scale, galls and leaf miners are potential problems.

Disease, pest, and problem resistance

Resistant to powdery mildew and borers.
Resistant to damage from ice and wind.

Native geographic location and habitat

Of hybrid origin.

Bark color and texture 

Bark is dark brown, ridged and furrowed.

Leaf or needle arrangement, size, shape, and texture

Alternate, simple leaves with rounded lobes.  Dark green in summer, changing to yellow-brown in fall.

Flower arrangement, shape, and size

Separate male and female flowers on the same tree; inconspicuous.

Fruit, cone, nut, and seed descriptions

Fruits are 1 inch ling, oval acorns borne on stalks that are 1 to 3 inches long.

Cultivars and their differences

Kindred Spirit® Ware's Oak (Quercus x warei 'Nadler'):  A columnar cultivar, growing 40 feet high by 6 feet wide; red-orange fall color.  Resistant to drought and powdery mildew.

Regal Prince® Ware's Oak (Quercus x warei 'Long'):  Narrow habit (45 feet high and 20 to 25 feet wide); excellent resistance to borers and powdery mildew.  Yellow fall color.

Location of Quercus warei (Ware's oak) at the Arboretum