Hau Kuahiwi
Hibiscadelphus giffardianus

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscadelphus
Species: giffardianus

Category:

Trees

Tropicals and Tender Perennials

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us

Height:

10-12 ft. (3-3.6 m)

12-15 ft. (3.6-4.7 m)

15-20 ft. (4.7-6 m)

Spacing:

10-12 ft. (3-3.6 m)

Hardiness:

USDA Zone 10a: to -1.1 C (30 F)

Sun Exposure:

Sun to Partial Shade

Light Shade

Danger:

N/A

Bloom Color:

Magenta (Pink-Purple)

Fuchsia (Red-Purple)

Bloom Time:

Late Winter/Early Spring

Late Fall/Early Winter

Mid Winter

Foliage:

Evergreen

Smooth-Textured

Other details:

This plant may be considered a protected species; check before digging or gathering seeds

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Non-patented

Propagation Methods:

From woody stem cuttings

From seed; direct sow outdoors in fall

Direct sow as soon as the ground can be worked

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds

Seed does not store well; sow as soon as possible

Regional

This plant has been said to grow in the following regions:

Kurtistown, Hawaii

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Dec 6, 2009, Metrosideros from Keaau, HI wrote:

Hau Kuahiwi, Hibiscadelphus giffardianus, is one of the rarest trees on Earth.
A single tree was discovered by Ranger W.C. Giffard in Kipuka Puaulu (Bird Park) on Mauna Loa in 1911. He propagated the tree and saved the species!
It is protected and preserved today by the National Park Service in Hawai'i Volcanoes National Park, along Mauna Loa Road.