INTRODUCTION
Pongam is a fast-growing evergreen tree which reaches 40 feet in height and spread, forming a broad, spreading canopy casting moderate shade. The three-inch-long, pinnately compound, glossy green
leaves are briefly deciduous, dropping for just a short period of time in early spring but being quickly replaced by new growth. In spring, Pongam is at its finest when the showy, hanging clusters of white, pink,
or lavender, pea-like, fragrant blossoms appear, the clusters up to 10 inches long. These beautiful blossoms and the glossy, nearly-evergreen leaves help make Pongam a favorite for use as a specimen, shade, or windbreak. It has also been planted as a street tree, but dropping pods often litter the ground. However, the seeds which are contained within the oval, 1.5- inch-long, brown seedpods are poisonous, a fact which should be considered in placing the tree in the landscape, if many children are present.

GENERAL INFORMATION
Scientific name: Pongamia pinnata
Pronunciation: pawn-GAM-ee-uh pih-NAY-tuh
Common name(s): Pongam, Karum Tree, Poonga-Oil Tree
Family: Leguminosae
USDA hardiness zones: 10B through 11 (Fig. 2)
Origin: not native to North America
Uses: large parking lot islands (> 200 square feet in size); wide tree lawns (>6 feet wide); medium-sized
parking lot islands (100-200 square feet in size); medium-sized tree lawns (4-6 feet wide); recommended for buffer strips around parking lots or for median strip plantings in the highway; near a deck or patio; shade tree; specimen; residential street tree; no proven urban tolerance
Availability: generally available in many areas within its hardiness range

 

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Flower
Flower color: lavender; pink; white
Flower characteristics: pleasant fragrance; showy; spring flowering

Fruit
Fruit shape: elongated; pod
Fruit length: 1 to 3 inches
Fruit covering: dry or hard
Fruit color: brown
Fruit characteristics: does not attract wildlife; fruit, twigs, or foliage cause significant litter; showy

USE AND MANAGEMENT
Pongam should be grown in full sun or partial shade on well-drained soil. A relatively lowmaintenance
tree once established, Pongam is resistant to high winds and drought but is susceptible to freezing temperatures below 30-degrees F. Pongam will show nutritional deficiencies if grown on soil with a pH above 7.5.

Space major limbs along the trunk to increase the structural strength of the tree. Keep limbs less than two-thirds the diameter of the trunk to help ensure that branches are well secured to the tree.

Propagation is by seed.

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