Photo by Melody

PlantFiles: Arizona Kidneywood, Palo Dulce
Eysenhardtia orthocarpa

Family: Papilionaceae (pa-pil-ee-uh-NAY-see-ee) (Info)
Genus: Eysenhardtia (eye-sen-HARD-tee-uh) (Info)
Species: orthocarpa (or-tho-KAR-pa) (Info)


24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)

6-8 ft. (1.8-2.4 m)

USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun

Unknown - Tell us

Bloom Color:
White/Near White

Bloom Time:
Late Summer/Early Fall


Other details:
This plant is attractive to bees, butterflies and/or birds
Flowers are fragrant
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
From softwood cuttings
From semi-hardwood cuttings
From seed; direct sow after last frost

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds

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By AridTropics
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1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive AridTropics On Nov 13, 2013, AridTropics from Bradenton , FL wrote:

Another "Desert" trial species I acquired this past spring. Eysenhardtia orthocarpa, or Arizona Kidneywood is a small sized, semi-deciduous tree which can be found growing in the hills, canyons, or along water courses above the hottest reaches of the desert in Southeast Arizona, far Southwest New Mexico, and down into Mexico.

While my own specimen barely reaches 6' in current height, this tree can reach upwards of 15-20' tall and a width up to 10' or so.

Flowers, produced in terminal spikes at the branch ends in late spring, summer, and into the fall, are tiny and white, but possess a strong Vanilla or Cinnamon sent upon close inspection. Moderately tolerant of dry conditions, specimens look better, lusher, flower more, and grow taller with a little extra water, especially in summer. Foliage resembles many other Legume-type trees and casts light filtered shade below larger specimens. While a rare sight in landscapes, this thornless, moderate growing gem of the Desert Southwest is a wonderful choice for entry ways, Patios, or as a screen. It is also hardy to 18F. The sent of the flowers is a pleasant addition to a warm summer evening as well.


This plant has been said to grow in the following regions:

Tempe, Arizona

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