Hibiscus rosa-sinensis
Light: Morning sun with afternoon shade in Phoenix; protect from intense western exposure and reflected heat.
Water: Moderate to high water needs in Phoenix. Water deeply when the top 1–2 inches of soil begin to dry; maintain even moisture without saturation. Containers may need daily watering during extreme summer heat; reduce watering in winter.
Soil: Rich, well-drained soil amended with compost; slightly acidic soil preferred. Mulch the root zone, keeping mulch away from the trunk.
Mature size: Commonly maintained at 6–10 feet tall and 3–5 feet wide as a column; unpruned size varies by cultivar and may reach 10–15 feet tall.
Bloom: Flowers repeatedly from spring through fall, potentially longer in frost-free locations. Extreme heat and cold can interrupt flowering.
Evergreen / deciduous: Evergreen in frost-free conditions; may shed leaves or suffer stem dieback during Phoenix cold snaps.
Growth rate: Moderate to fast with warmth, consistent moisture and appropriate fertilization.