in Tucson, Phoenix,
and Southern California

Gardening in Tucson, Phoenix, and Southern California

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Senna artemisioides: Silver Senna / Feathery Cassia

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Form: Rounded shrub.
Leaf retention: Evergreen.
Growth rate: Rapid.
Mature Size: 6' high and wide. Needs 8' diameter space for growth.
Flowers: Five yellow, cupped petals, fragrant, growing in clusters.
Bloom: Winter to spring.
Fruit: Flat bean pod, green turning to brown.
Leaves: Feathery, narrow and linear, light green to gray-green, covered in tiny hairs.
Stems: No thorns.
Roots: Nitrogen-fixing*.
Wildlife: Attracts butterflies, bees, and small birds.
Toxic / Danger: No.
Origin: Australia

Cultivation and Uses
USDA hardiness zones: 9-11. Damaged below 22°F.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun.
Water once established: Monthly.
Soil: Well drained to avoid root rot, dry, pH 6.6-8.5 (slightly acidic to alkaline). *Do not use a nitrogen fertilizer.
Prune: Lightly, soon after flowering. Best blooms if allowed to grow "spiky" after spring trimming. New flower buds set in August. Pruning after August eliminates flowering the following winter. Prune moderately to spur new growth and to shape.
Litter: Abundant bean pods.
Propagation: Seed soaked in hot water.
Uses: Ornamental, xeric garden.

Former scientific names: Cassia artemisioides, Cassia nemophila, and Cassia eremophila. A very hardy plant.

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