White hibiscus shrub with glossy dark green leaves and large single white flowers in a garden bed

White Hibiscus

Hibiscus rosa-sinensis 'Alba'
Categories:
Shrubs  ·  
Flowering Shrubs
Light
Morning sun / afternoon shade
Water
Moderate to high water in Phoenix. Water deeply when the top 1–2 inches of soil dry; maintain even moisture without waterlogging. Containers may need daily watering during extreme heat; reduce watering in winter.
Size
3-5 ft tall × 3-5 ft wide
Habit
Rounded shrub
Toxicity
Non-toxic
Description
Assumed to be a white-flowered tropical hibiscus (Hibiscus rosa-sinensis), a lush shrub with glossy leaves and large, showy flowers; cultivar affects size and flower form.
Bloom Time
Spring through fall
Deciduous / Evergreen
Evergreen
Special Features
Attracts Bees / Pollinators, Showy Flowers
Growth Rate
Moderate to fast
Growth Habit
Rounded shrub
Mature Size
3-5 ft tall × 3-5 ft wide
Flower Color
White
Foliage Color
Dark green
Landscape Use
Border / Bed, Container / Patio, Foundation Planting, Hedge / Screen, Tropical Garden
Garden Style
Container / Patio, Hedge / Formal, Pollinator / Wildlife, Tropical
Soil
Amended / Rich, Prefers Acidic, Well-Drained
Companion Plants
Canna lily, Dwarf ruellia, Moisture conditions, Society garlic
Non-toxic
Non-toxic
Care Instructions

Light: Morning sun with afternoon shade in Phoenix; protect from intense reflected heat and hot, drying winds.

Water: Moderate to high water in Phoenix. Water deeply when the top 1–2 inches of soil dry; maintain even moisture without waterlogging. Containers may need daily watering during extreme heat; reduce watering in winter.

Soil: Well-drained soil enriched with compost; slightly acidic to neutral preferred. Mulch the root zone, keeping mulch away from the trunk.

Mature size: Typically 6–10 feet tall and 4–8 feet wide, depending on cultivar; often smaller in containers or where frost causes dieback.

Bloom: Mainly spring through fall; flowering may slow during extreme summer heat and winter cold. Individual flowers usually last 1–2 days.

Evergreen / deciduous: Evergreen in frost-free conditions; may lose leaves or suffer stem dieback during Phoenix cold snaps.

Growth rate: Moderate to fast with warmth, adequate moisture, and nutrition.