Form: A tall, multi-stemmed shrub that can be pruned into a tree.
Leaf retention: Semi-evergreen, with new leaves replacing the old at the same time, during bloom.
Growth rate: Slow to moderate, depending on water.
Mature Size: 20' high and 15' wide.
Flowers: Very tiny, clustered flowers with male parts appearing before female, avoiding
self-pollination. Flowers have purple (male) anthers and yellow aging to brown (female) stigma and
ovaries in green sepals. No petals. Two plants are required to produce seeds.
Bloom: Mid winter.
Fruit: Small winged seed.
Leaves: Green compound leaflets, 2-3 inches long, lance-shaped, margins slightly toothed. This
tree provides light to medium shade.
Stems: No thorns. The bark is light gray and smooth.
Wildlife: Attracts bees. Browsed by mammals.
Toxic / Danger: No.
Origin: Arizona to Texas and Mexico.
Cultivation and Uses
USDA hardiness zones: 7b-10.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun to part shade.
Water once established: Deep water once or twice a month at the drip line. Watering more often
improves its rate of growth. In the first five years, it may need weekly watering during the hottest
months of the year for the best appearance.
Soil: Well-drained, pH 6.6-8.5 (neutral to alkaline).
First Year Care: Deep water once week, at the drip line, coordinating with rains, to establish
a strong root system.
Prune: In winter, the lower branches can be removed to train it into a tree.
Propagation: Seed, stratified.
Uses: Ornamental. In shrub form it can be used as a screen.
This plant is a member of the Olive family (Oleaceae). Another common name is Gregg's Ash.
The tree pictured is planted near an east-facing wall, which partly shades it from the
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Latest update: February, 2019.