Scientific: Geijera parviflora
Common: Australia willow, wilga (weird local common name)
Family: Rutaceae
Origin: East regions of Australia

Pronounciation: Gee-JER-a par-vi-FLOOR-a

Hardiness zones:
Sunset 8-9, 12-24
USDA 9-11

Landscape Use: Specimen tree, patio tree, background screen for oasis and mesic landscape design themes.

Form & Character: Upright, oblong rounded form, foliage pendulous, clean.

Growth Habit: Woody evergreen tree, slow growth rate when young to faster with age ultimately reaching 30 feet in height with 20 to 25 feet spread.

Foliage/texture: Leaves glabrous, shiny and thickened, linear to lanceolate, prominent midvein, falcate to about 6 inches long; medium fine texture.

Flowers & fruits: Small, creamy yellow flowers in terminal branched clusters in spring (occasionally fall) followed by small fruit which dehisces into separate, obtuse sections, inconspicuous.

Seasonal color: Shows a very subtle flower color in spring.

Temperature: Tolerant of lower Sonoran Desert temperature extremes.

Light: Full sun is best with one important caveat.....DO NOT allow direct exposure of the trunk to western summer sun. In Phoenix, direct summer sunlight on Australian willow trunks = sunscald injury every time.

Soil: Well drained

Watering: In Phoenix, Australian willow needs regular supplemental water, relatively drought intolerant.

Pruning: Raise the canopy base only minimally as necessary to avoid trunk sunscald injury.

Propagation: Difficult to propagate by either seed or cutting.

Disease and pests: Quite prone to Phytophthora root rot.

Additional comments: Australian willow is a close relative to Citrus. It has a willow-like grace mixed with eucalyptus toughness, except for it's high potential for unscald injury on thin barked trunk caused by direct exposure to Phoenix sun. Australian willow is a clean tree with little to no litter problem. Generally performs better in coastal California than in California and Arizona low deserts.

Ethnobotanical note: Native Australian Aboriginal peoples used crushed leaves of Australian willow for internal and external pain relief.