Rose of Sharon Hibiscus – Desert Horizon Nursery

Rose of Sharon Hibiscus

Hibiscus syriacus
Categories:
Shrubs  ·  
Flowering Shrubs
Light
Morning sun / afternoon shade
Water
Water deeply and regularly during hot weather, allowing the upper few inches of soil to dry slightly between waterings. Keep newly planted shrubs consistently moist but not soggy; reduce watering after leaf drop.
Size
8-12 ft tall × 6-10 ft wide
Habit
Upright shrub
Toxicity
Toxic — Pets
Description
An upright, deciduous flowering shrub with showy hibiscus blooms. Cold hardy in Zone 9b, but needs protection from Phoenix’s intense afternoon heat and is not a low-water desert plant.
Bloom Time
Summer to fall
Deciduous / Evergreen
Deciduous
Special Features
Attracts Bees / Pollinators, Attracts Butterflies, Attracts Hummingbirds
Growth Rate
Moderate
Growth Habit
Upright shrub
Mature Size
8-12 ft tall × 6-10 ft wide
Flower Color
White / pink / lavender / purple / red / or bicolor (varies by cultivar)
Foliage Color
Medium green
Landscape Use
Border / Bed, Desert / Xeriscape, Hedge / Screen, Specimen / Accent
Garden Style
Desert / Xeriscape, Hedge / Formal, Pollinator / Wildlife
Soil
Alkaline Tolerant, Amended / Rich, Prefers Acidic, Well-Drained
Companion Plants
Daylilies, Dwarf crape myrtle, Society garlic
Toxic — Pets
Mildly toxic to pets if ingested (GI upset)
Care Instructions

Light: Morning sun with afternoon shade in Phoenix; avoid reflected heat from west-facing walls and pavement.

Water: Water deeply and regularly during hot weather, allowing the upper few inches of soil to dry slightly between waterings. Keep newly planted shrubs consistently moist but not soggy; reduce watering after leaf drop.

Soil: Well-drained soil enriched with compost. Prefers slightly acidic to neutral conditions but tolerates some alkalinity; mulch the root zone while keeping mulch away from the trunk.

Mature size: Typically 8–12 feet tall and 6–10 feet wide; compact cultivars remain smaller.

Bloom: Summer through early fall; extreme heat or moisture stress may reduce flowering.

Evergreen / deciduous: Deciduous; loses leaves in fall or winter and may leaf out relatively late in spring.

Growth rate: Moderate; growth slows under extreme heat, drought, or poor soil conditions.