SelecTree: Tree Detail
O'NEILL RED HORSECHESTNUT
Aesculus × carnea 'O'neill Red'
Photo Locations: Dallas Arboretum - Dallas, TX
A hybrid between Aesculus Hippocastanum × Aesculus pavia.
Showy double-red flowers in spring.
Has Unpleasant Bark fragrance.
Erect or Spreading with a High Canopy.
Has Deciduous foliage.
Height: 35 - 50 feet.
Width: 30 - 40 feet.
Growth Rate: 24 Inches per Year.
Longevity 50 to 150 years.
Leaves Palmately Compound, Dark Green, Bronze or No Change, Deciduous.
Flowers Showy. Red. Flowers in Spring. Has perfect flowers (male and female parts in each flower).
Brown Capsule, Large (1.50 - 3.00 inches), fruiting in Fall Wildlife use it.
Bark Dark Brown, Fissured.
Shading Capacity Rated as Dense in Leaf.
Shading Capacity Rated as Moderately Low out of Leaf.
Litter Issue is Dry Fruit, Leaves and Twigs.
Tree Site Conditions & Constraints
Sunset Zones 1 - 10, 12 and 14 - 17.
Exposure Full Sun.
Clay, Loam or Sand Texture.
Highly Acidic to Slightly Alkaline Soil pH.
Seaside Tolerance is Good in Mild Zone.
Pests & Disease Information
Susceptible to Chlorosis.
Health, Safety & Environmental Concerns
Branch Strength Rated as Medium.
Root Damage Potential Rated as Low.
None Known Health Hazard.
Attracts Birds and Squirrels.
Wildlife use Fruit.
Special Uses & Values
Cite this tree:
SelecTree. "Aesculus × carnea 'O'neill Red' Tree Record." 1995-2018. Feb 21, 2018.
< http://selectree.calpoly.edu/tree-detail/aesculus-×-carnea-oneill-red >