Chinese hibiscus.

At a glance

Care level

Moderate

Plant type

Tropical shrub

Light

Full sun

Indoor light

Direct sun

Water

Every 2 to 4 days

Mature size

5 to 15 feet

Growth rate

Fast

Hardiness

USDA 9 to 11

Bloom time

Spring to autumn

Care

Keep this plant in a spot with plenty of sun to encourage those beautiful blooms. Watch for yellowing leaves, which often signal that the plant is getting too much water or not enough light. Regularly check for pests like aphids or spider mites that love to hide on the undersides of the leaves.

Watering

Keep the soil consistently moist but never soggy.

Feeding

Use a high potassium fertilizer during the active growing season to support flowering.

Pruning

Trim back the branches in early spring to encourage a bushier shape and more blooms.

Repotting

Move to a slightly larger container once the roots begin to circle the bottom of the pot.

Soil

Well-draining, fertile potting mix

Soil pH

6.0 to 7.0

Temperature

10 to 35°C

Humidity

50 to 80%

Drought tolerance

Low

Lifespan

Perennial, typically 10 to 20 years

Deer and rabbits

Moderate

Safety

People

The plant is generally considered non toxic but can cause mild digestive irritation if ingested in large quantities.

Pets

This plant is considered non-toxic to cats and dogs, though it is best to keep them from snacking on the foliage.

Children

Keep away from small children as the large, colorful flowers are tempting to pull and eat.

Contact allergens

The sap can cause minor skin irritation in sensitive individuals.

Airborne allergens

Pollen may trigger mild reactions in those with severe hay fever.

Edibility

The flowers of this species are edible and are used in teas, salads and drinks in parts of Asia. Only eat flowers that have not been treated with pesticides, and eat them in moderation, as large amounts may cause stomach upset.

How to identify it

• Large, showy, five petaled flowers
• Glossy, dark green, serrated leaves
• Prominent central stamen column
• Woody, upright shrub growth habit

Height

1.5 to 4.5m

Spread

1 to 3m

Leaves

glossy green, evergreen

Flowers

red, pink, orange, yellow, white, 8 to 18cm

Problems to watch for

• AphidsCommon
• Sooty MoldCommon
• Spider MitesCommon
• WhiteflyCommon
• Bud DropUncommon
• ChlorosisUncommon
• Root RotUncommon
• Scale InsectsUncommon

Growing it

Propagation

cuttings, grafting

When to plant

spring, early summer

Overwintering

Move containers indoors before the first frost. Keep in a bright, cool spot and reduce watering significantly until spring.

In containers

It grows beautifully in containers, provided the pot is at least 30 centimeters wide and has excellent drainage.

Group with other tropical plants to create a microclimate that boosts humidity.

Grows well with

• Lantana · They share similar light and water requirements in tropical landscapes.
• Ixora · Provides a nice textural contrast with its dense, smaller leaves.

Similar species

• Rose of Sharon · A much hardier cousin that can survive freezing temperatures.

Science

Family

Malvaceae

Genus

Hibiscus

Order

Malvales

Class

Magnoliopsida

Native range

Tropical Asia

Conservation

Not a conservation concern as it is widely cultivated globally.

It thrives in warm, humid tropical climates where it can grow year round.

Value to wildlife

nectar source

Pollinators

butterflies, hummingbirds

Uses

ornamental shrub, container plant, tropical hedge

Taxonomy resolved against GBIF.

Questions people ask

Why are my flower buds falling off?

This is often caused by inconsistent watering or sudden temperature changes.

Can I grow this indoors?

Yes, but it requires a very sunny window and high humidity to thrive.

Where the name comes from

The name rosa-sinensis translates to rose of China, though it is not a true rose.

Good to know

• It is the national flower of Malaysia.
• The blooms are edible and sometimes used in salads or drinks.
• There are thousands of hybrid varieties available today.