Giant Arrowhead
Sagittaria montevidensis
- Native to:
- Argentina, Bolivia, Brazil, Chile, Paraguay, Peru, Uruguay
Andrés González





Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Alismataceae
- Genus:
- Sagittaria
- Species:
- Sagittaria montevidensis
- USDA Symbol:
- SAMO
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 150 cm
- Light Requirements:
- Full Sun,Part Shade
- Drought Tolerance:
- Low
- Bloom Months:
- jun,jul,aug,sep
- Bloom Colors:
- white
Keystone Species Ranking
- Caterpillar Keystone:
- ★★☆☆☆ Butterfly & moth species supported by this genus (NWF)
Garden & Ecology Notes
- Wildlife Value:
- waterfowl, birds, fish
- Deer Resistant:
- 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:
- Commonly found in marshes and wetlands
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 14–28 days
- Notes:
- Seeds require wet or submerged conditions for germination. Light may enhance germination.
The above propagation data sourced from Claude AI