Giant Arrowhead

Sagittaria montevidensis

Native to:
Argentina, Bolivia, Brazil, Chile, Paraguay, Peru, Uruguay

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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