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Hibiscus waimeae
Kauai White Hibiscus
Hibiscus waimeae
Hibiscus waimeae is a critically endangered, shrubby hibiscus species endemic to the island of Kauai in Hawaii. It is characterized by its relatively small size compared to other hibiscus, typically growing to only a few feet in height. Its leaves are usually ovate with toothed edges, and it produces striking, relatively small flowers with colors ranging from white to yellow to deep orange or pink. The flowers are often described as having a delicate beauty and an ethereal quality. This hibiscus is of significant conservation concern due to its restricted habitat and threats from habitat loss, invasive species, and disease. Its rarity makes it a highly valued and sought-after plant for conservation efforts.
CategoryDetails
Plant TypePerennial plant
Estimated Plant Lifespan10 years lifespan
Sun Requirements4-6 hours direct sunlight (Partial Sun)
Pollination

Method: Insect pollination

Watering Requirements

Method: Top water

Frequency: When top inch of soil is dry

Notes: Avoid overwatering to prevent root rot.

Humidity Requirements

Level: Moderate

Cleaning RequirementsProtect from strong winds and frost. Regularly inspect for pests.
Temperature Range

Min: 10Ā°C

Max: 30Ā°C

Alternative NamesWhite Kauai Rosemallow, kokiā€˜o keā€˜okeā€˜o
Bidens pilosa
Hairy Beggarticks
Bidens pilosa
Spanish needles are native to Hawaii and can help attract beneficial pollinators such as bees and butterflies to the area, potentially assisting with the pollination of the Hibiscus waimeae.
Coprosma ernodeoides
'Aiakanene
Coprosma ernodeoides
Kauai Coprosma is a native shrub that can help provide ground cover and reduce weed competition around the delicate Hibiscus waimeae, improving moisture retention and potentially providing some shade.
Cenchrus setaceus
Fountain Grass
Cenchrus setaceus

Fountain grass is a vigorous, fast-growing species that can easily outcompete Hibiscus waimeae for resources like water, nutrients, and sunlight, potentially leading to the decline of the endangered hibiscus.

Lantana camara
common lantana
Lantana camara

Lantana is a highly invasive species that aggressively competes with native plants. Its rapid growth and dense foliage can overshade and outcompete Hibiscus waimeae, suppressing its growth and reproductive success.

Aphids

Small, soft-bodied insects that suck sap from the plant, causing leaf distortion, yellowing, and stunted growth. They can also secrete honeydew, which leads to sooty mold.

Whiteflies

Tiny white insects that cluster on the undersides of leaves, sucking sap and causing yellowing and wilting. They also excrete honeydew, promoting the growth of sooty mold.

Steps:

    • Take 4-6 inch cuttings from healthy, non-flowering stems.
    • Remove lower leaves to prevent rotting.
    • Dip the cut end in rooting hormone.
    • Plant cuttings in a well-draining mix of perlite and peat moss.
    • Keep the soil moist but not soggy.
    • Maintain high humidity by covering with a plastic bag or humidity dome.
    • Place in bright, indirect light.
    • Roots should develop in several weeks.

Neem oil

A natural insecticide effective against many common hibiscus pests like aphids and whiteflies.

Kelp extract

Provides essential nutrients to support strong growth and resilience to stress.