Campanulaceae
Clermontia arborescens subsp. waihiae
Clermontia arborescens subsp. waihiae
Also known as Delissea waihiae
Tropical Plants · Flowering Plants · Native Plants · Trees & Shrubs · Hawaiian Endemic · Endangered · Tropical · Lobelioid · Campanulaceae · Rare · Conservation · Shrub · Clermontia · Hawaii
This rare Hawaiian lobelioid shrub is endemic to Kauai and is critically endangered in the wild, making it extremely difficult to source and cultivate outside of specialist botanical collections. It requires humid, tropical conditions with filtered light and consistently moist, well-drained soil to thrive. Growing this plant is a meaningful conservation effort, but it demands expert attention to humidity and temperature.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Water thoroughly to keep soil consistently moist but not waterlogged; mist foliage in dry conditions · Every 5-7 days
- Maintenance
- High
- Soil
- loam
- Soil pH
- 6–8
- Temperature
- 55°F to 100°F
- Cycle
- Perennial
Hardiness
USDA 9a-12b
Form & growth
Mature size and habit
- Mature height
- 3 ft – 10 ft
- Spread
- 6.7 ft
- Spacing
- 72 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Hawaii
- Attracts
- Birds, Hummingbirds
Sources: trefle
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