Oahu Riverhemp 🛑 Endangered
Sesbania tomentosa
- Native to:
- Hawaii, United States
Photo by David J. Stang







Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Fabaceae
- Genus:
- Sesbania
- Species:
- Sesbania tomentosa
- USDA Symbol:
- SETO3
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Shrub
- Height:
- 300 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- jan,feb,mar,apr,may,jun,jul,aug,sep,oct,nov,dec
- Bloom Colors:
- yellow, orange, red
- Landscaping Shrub:
- Yes
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Garden & Ecology Notes
- Wildlife Value:
- bees, birds
- Salt Tolerant:
- Yes
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Can resprout from roots after fire or damage. Historically found in coastal strand and dry shrubland habitats with periodic disturbance.
Soil Requirements
- Soil Type:
- sandy, well-drained, nutrient-poor soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to coastal areas, tolerates saline conditions
Propagation & Germination
- Stratification:
- None required
- Scarification:
- Seed coat scarification required before sowing
- Germination Time:
- 7–30 days
- Notes:
- Scarification of the hard seed coat is required for germination. Hot water treatment or mechanical scarification improves germination rates.
The above propagation data sourced from Claude AI