CRIMSON SPIRE™ oak is a hybrid between English oak and White oak. It was selected for a narrow form (15 feet wide) and good red fall color. It is tolerant of a wide range of conditions.
All Common Names:
- Residential and parks,
- City parkway,
- Wide median,
- Restricted sites
Tree or Plant Type:
- Deciduous (seasonally loses leaves)
- Shade tree,
- Large tree (more than 40 feet)
- Full sun (6 hrs direct light daily)
- Zone 4,
- Zone 5 (Chicago),
- Zone 6,
- Zone 7
- Moist, well-drained soil
- Dry sites,
- Occasional drought,
- Alkaline soil
- Moderately Tolerant
- Messy fruit/plant parts
- Fall color
Season of Interest:
- Mid fall,
- Late fall
Flower Color & Fragrance:
Shape or Form:
- Migrant birds,
- Small mammals
Tree & Plant Care
Prune oaks in the dormant season to avoid attracting beetles that may carry oak wilt. More tolerant of wet sites than its white oak parent, but well drained sites are best. Intolerant of salt.
Disease, pests, and problems
Oak wilt, anthracnose, two-lined chestnut borer are possible problems.
Disease, pest, and problem resistance
Resistant to powdery mildew.
Native geographic location and habitat
Of hybrid origin.
Bark color and texture
Bark is dark brown and furrowed.
Leaf or needle arrangement, size, shape, and texture
Alternate, lobed leaves; dark green in summer changing to red in fall.
Flower arrangement, shape, and size
Flowers are not ornamentally important. Drooping, male catkins appear in April. Female flowers are inconspicuous tiny spikes in axils of new leaves.
Fruit, cone, nut, and seed descriptions
1-inch long, elongated nut is enclosed with a warty cap. The cap covers about 1/4 of the nut.
Acorns ripen in fall and can be considered a litter problem, especially near sidewalks and patios.