Gardening
in Tucson, Phoenix,
Arizona and California

Gardening in Tucson, Phoenix, Arizona and California

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Growing Senna wislizeni: Wislizenus' Senna

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Description
Form: Shrub.
Leaf retention: Deciduous.
Growth rate: Moderate.
Mature Size: Usually 4-6' high and wide, but can reach 10'.
Flowers: Five yellow, cupped petals, 1" wide, clustered at branch tips. No nectar is produced.
Bloom: Spring, summer.
Fruit: Long, narrow, dark brown, flattened bean pods.
Leaves: Small, oval, dark green.
Stems: Stiff, upright, no thorns.
Roots: Nitrogen-fixing*.
Wildlife: Attracts butterflies and bees. It is a caterpillar food plant for several species of sulphur butterflies.
Toxic / Danger: All parts are toxic.
Origin: Arizona through Texas and Mexico.

Cultivation and Uses
USDA hardiness zones: 7b-11. This plant may die to the ground in severe winter freezes and grow back from its roots.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun.
Water once established: Monthly.
Soil: Well drained, dry, pH 6.1-8.5 (slightly acidic to alkaline). *Do not use a nitrogen fertilizer.
Prune: After the last freeze, or in early winter in regions without freezes, trim branches to shape, encouraging new growth.
Litter: Moderate flower and leaf drop.
Propagation: Seed, cuttings.
Uses: Ornamental, butterfly caterpillar nursery.

Comments
This plant is a member of the legume family (Leguminosae). Other common names are Canyon Senna and Shrubby Senna.



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Latest update: February, 2019.

Senna wislizeni: Wislizenus' Senna - flowers

Senna wislizeni: Wislizenus' Senna - seed pods

Senna wislizeni: Wislizenus' Senna