Species · genus Hibiscus · Malvaceae

White Molokai Hibiscus

Hibiscus arnottianus A.Gray

Also known as: White Rosemallow · Hawaiian White Hibiscus · Koki‘o Ke‘oke‘o

Growth habit

tree

Native range

Hawaii

Reference · H. arnottianus

Cultivars of H. arnottianus

The named forms growers keep — each with its own page, each honest about how much we know.

No named cultivars catalogued under H. arnottianus yet. When growers document a stable, named form, it earns its own page here.

Guide

The species-level account. Cultivar pages build on this and say where they differ.

A flowering tree native to the Hawaiian islands, where it grows in open, sunny conditions. As a tree from the Malvaceae family it wants strong light and a steady but not soggy root zone — water when the top inch or two of mix has dried, then water deeply, allowing the surface to approach dryness again before the next watering. Provide a free-draining mix, as standing water at the roots invites rot.

Care recipe

The species record — the baseline every cultivar inherits unless it says otherwise.

Care notes are early — not yet verified

Light: ai:claude-opus-4-8
Water: ai:claude-opus-4-8 (range 5-10d)
Humidity: ai:claude-opus-4-8
Soil: ai:claude-fable-5
Care: ai:claude-fable-5

Light

Direct sun

Water

≈ every 10 days

Humidity

Medium

Temperature

13–30 °C

Soil mix

Rich, well-draining loamy potting mix

Propagation

Softwood stem cuttings

Fertilizing

Regular balanced feed every 2-4 weeks while growing

Growth rate

Moderate

Flowering

Fragrant white blooms with bright light and warmth

ToxicityAuthoritative · species

Not yet documented

This is where toxicity lives — every cultivar of this species inherits it and none can override it.

Reference images

Every image credited. Licenses link to their deeds.

No reference gallery yet

A few clear photos — habit, a mature leaf, a flower if it blooms — would give this page its eyes.

Add images

Sources: ai:claude-opus-4-8 · ai:claude-opus-4-8 (range 5-10d) · ai:claude-fable-5

Kept true by its growers

Every fact here carries its source. Grow White Molokai Hibiscus yourself? What you’ve observed — how it drinks, how it holds its color, a name that’s off — is exactly what keeps this page honest. Contributions are reviewed before anything changes.