Pronounciation: SIN-na ar-te-mi-see-OYE-deez o-li-go-FIL-la

Hardiness zones
Sunset 12-24
USDA 9-11

Landscape Use: Informal of clipped hedge, background, screen, raised planter beds, oasis and xeric garden accent.

Form & Character: Rounded, open, create feeling of intimacy and openness.

Growth Habit: Evergreen, woody, broadleaf perennial shrub, moderate fast grower to 5-feet tall with equal spread, rate of growth strongly influenced by water availability.

Foliage/Texture: Medium green to gray green, somewhat pubescent, 4 leaflets/leaf, leaflets lanceolate to 1 inch in length; medium fine texture.

Flowers & Fruits: Golden yellow pea flowers in late winter to early spring at same time as other Senna species, but not fragrant; thin pod, green when immature, dark brown during late spring to summer, unsightly.

Seasonal Color: Golden yellow in winter to early spring.

Temperature: Hardy to 18^oF.

Light: Full sun, no shade.

Soil: Well drained is best.

Watering: Drought tolerant

Pruning: Prune as necessary only after flowering, severe renewal pruning after flowering will rejuvenate, but like other Senna taxa make sure to leave some foliage. Frequent shearing will severely negatively impact spring floral display as this plant sets flower buds in August.

Propagation: Seed, mechanical or acid scarification of seed coat is required.

Disease and Pests: Root rot if soil is poorly drained.

Additional comments: This is a wonderful senna that because of its relatively more coarse texture and demure habit should be more used in the smaller garden spaces of xeric Phoenix landscapes. This is a really delightful Australian shrub. Outback senna looks sparse when growing in a nursery container, but will fill in nicely once planted into the landscape.