Alligatorweed
Alternanthera philoxeroides
- Native to:
- Argentina, Bolivia, Brazil, Colombia, French Guiana, Guyana, Paraguay, Peru, Puerto Rico, Suriname, Trinidad-Tobago, Uruguay, Venezuela
National Plant Data Center, Baton Rouge, LA 70874-4490 USA.






Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Amaranthaceae
- Genus:
- Alternanthera
- Species:
- Alternanthera philoxeroides
- USDA Symbol:
- ALPH
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 100 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Low
- Bloom Months:
- jan,feb,mar,apr,may,jun,jul,aug,sep,oct,nov,dec
- Bloom Colors:
- white
- Ground Cover:
- Yes
Wildlife Benefits
- Butterflies & Moths:
- ★★★☆☆ Documented Lepidoptera association (GBIF)
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Host Plant for Caterpillars
Vogtia malloi
Garden & Ecology Notes
- Wildlife Value:
- birds, small mammals
- Salt Tolerant:
- Yes
Soil Requirements
- Soil Type:
- rich, waterlogged, organic soil
- pH:
- 5.5 - 7.5 (slightly acidic to neutral)
- Drainage:
- tolerates poor drainage
- Moisture:
- consistently moist
- Notes:
- thrives in wetland areas and water edges