Wikipedia Reference

Growth habit: Shrub (Source: USDA Plants)

Duration (Annual/Perennial): Perennial (Source: USDA Plants)

Family: Malvaceae

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Bloom Color: Yellow (Source: wildflower.org)

Bloom Time: Mar , Apr , May , Jun , Jul , Aug , Sep , Oct , Nov (Source: wildflower.org)

USA: AZ , NM , TX (Source: wildflower.org)

Native Distribution: W. TX to s. AZ & adjacent Mex. (Source: wildflower.org)

Native Habitat: Rocky slopes; steep, canyon walls (Source: wildflower.org)

Light Requirement: Part Shade (Source: wildflower.org)

Soil Moisture: Dry (Source: wildflower.org)

Soil Description: Dry, rocky soils. (Source: wildflower.org)

Conditions Comments: Drought tolerant. This plant should be cut back nearly to the base each winter to encourage a bushier habit and more blooms. Coulter hibiscus flowers during the hottest part of the season when other plants are not showy. It is short-lived, but reseeds freely. (Source: wildflower.org)

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Prefers well draining, rocky soil. Benefits from slight shelter from extreme heat and drought when young, but can tolerate harsh conditions once established.