SelecTree: Tree Detail
Robinia × ambigua 'Idahoensis'
Flowers are a bright magenta rose color. This is one of the showiest locusts in bloom.
Erect or Spreading with a High Canopy.
Has Deciduous foliage.
Height: 40 feet.
Width: 30 feet.
Growth Rate: 24 to 36 Inches per Year.
Longevity 50 to 150 years.
Leaves Pinnately Compound Odd, Medium to Dark Green, Gold, Deciduous.
Flowers Showy. Pink, Purple or Rose. Flowers in Spring or Summer. Has perfect flowers (male and female parts in each flower).
Brown Pod, Large (1.50 - 3.00 inches), fruiting in Summer or Fall.
Bark Light Green, Fissured.
Shading Capacity Rated as Moderately Low in Leaf.
Shading Capacity Rated as Moderate out of Leaf.
Litter Issue is Dry Fruit.
Tree Site Conditions & Constraints
Sunset Zones 2 - 24.
USDA Hardiness Zones 4 - 10.
Exposure Full Sun to Partial Shade.
Moist to Dry Soil.
Clay, Loam or Sand Texture.
Highly Acidic to Highly Alkaline Soil pH.
Seaside Tolerance is Good in Mild Zone.
Pests & Disease Information
Susceptible to Aphids, Fusarium, Oak Root Rot and Root Rot.
Health, Safety & Environmental Concerns
Branch Strength Rated as Medium Weak
Root Damage Potential Rated as High.
None Known Health Hazard.
Special Uses & Values
Cite this tree:
SelecTree. "Robinia × ambigua 'Idahoensis' Tree Record." 1995-2017. Oct 20, 2017.
< http://selectree.calpoly.edu/tree-detail/robinia-×-ambigua-idahoensis >