Eysenhardtia orthocarpa (Kidneywood)
Foliage: Semi-Evergreen to Deciduous
Mature Height: 10’ - 20’
Mature Width: 6’ - 12’
Growth Rate: Moderate
Hardiness: 18 degrees F
Exposure: Full Sun
Leaf Color: Green
Shade: Filtered
Flower Color: White
Flower Shape: Terminal Spikes
Flower Season: Spring
Thorns: None
Propagation Method: Seed
Sizes Available: Not in Production
Kidneywood (E. orthocarpa) grows naturally in water courses, canyon slopes and hillsides where summer water is periodically available. Its natural distribution is limited by summer rainfall patterns and relatively mild winter temperatures. It is both cold temperature and drought deciduous but in mild winters or protected microclimates retains its foliage through the winter. It grows naturally as multiple slender branches with no thorns. Depending on available water, trees reach heights ranging from 10 to 20 feet tall with 6 to 12 foot spread. Trees planted in landscape setting with regular irrigation will tend to mature toward the upper end of this range. Flowers appear sporadically from April to September, typically in response to winter and summer rains. These fragrant, white flowers are arranged, at the branch terminal, in a long slender, spike-like raceme 2 to 3 inches long. Pods containing one seed each are produced from the flowers. Mature pods detach from the tree easily.
The Eysenhardtia tree provides lush green, lacy canopies, are thornless and are ideal for patios, entry courts, as a screen planting. They can also be mixed with more deciduous materials to provide color and texture during the winter months. Fragrant flowers and leaves are an added benefit that Kidneywoods bring to desert landscapes.
The information provided here was gathered from research literature published by the University of Arizona, other professional landscape and horticulture organizations and our experience at Arid Zone Trees. Always consult local landscape experts for recommendations for your specific area.