Outback Cassia – Desert Horizon Nursery

Outback Cassia

Senna artemisioides
Categories:
Shrubs  ·  
Desert Shrubs
Light
Full sun
Water
Low water once established. Water deeply, then allow soil to dry between irrigations. Provide occasional supplemental summer irrigation in Phoenix; water more regularly during establishment and reduce watering in winter.
Size
4-6 ft tall × 4-6 ft wide
Habit
Rounded shrub
Toxicity
Toxic — Pets
Description
An Australian desert shrub with airy branching, narrow gray-green leaflets, and abundant yellow flowers; well suited to Phoenix’s hot, dry climate.
Bloom Time
Late winter to spring
Deciduous / Evergreen
Evergreen
Special Features
Attracts Bees / Pollinators, Drought Tolerant
Growth Rate
Moderate
Growth Habit
Rounded shrub
Mature Size
4-6 ft tall × 4-6 ft wide
Flower Color
Yellow
Foliage Color
Silver-gray
Landscape Use
Border / Bed, Desert / Xeriscape, Hedge / Screen
Garden Style
Desert / Xeriscape, Hedge / Formal, Pollinator / Wildlife
Soil
Alkaline Tolerant, Sandy / Rocky, Well-Drained
Companion Plants
Blackfoot daisy, Desert spoon, Fairy duster, Globe mallow, Red yucca, Santa Rita prickly pear
Toxic — Pets
Seeds/pods may be toxic if ingested (GI upset)
Care Instructions

Light: Full sun for best flowering and a compact form; tolerates light shade.

Water: Low water once established. Water deeply, then allow soil to dry between irrigations. Provide occasional supplemental summer irrigation in Phoenix; water more regularly during establishment and reduce watering in winter.

Soil: Well-drained sandy, gravelly, or rocky soil. Tolerates alkaline desert soils; avoid persistently wet soil and poorly drained clay.

Mature size: Approximately 5–8 feet tall and wide, depending on form and growing conditions.

Bloom: Late winter through spring, sometimes beginning in midwinter during mild Phoenix weather.

Evergreen / deciduous: Evergreen in typical Phoenix conditions; severe cold or prolonged drought may cause some leaf loss.

Growth rate: Moderate to fast with suitable drainage and supplemental irrigation.