Light. Full sun to partial shade.
Water. A plant for wet soil or shallow water up to 12 in deep. Do not plant it deeper, and do not let it dry out for long periods.
Soil and feeding. It wants rich, organic, wet soil. In a pond, extra fertilizer is usually needed only if the water is low in nutrients.
Size. Grows to about 3 ft tall and forms spreading clumps; allow 3–6 ft of space.
Pruning. Cut off spent flowers to stop self-seeding. It spreads by rhizomes and seed and can take over small ponds.
Problems to watch. No serious pests or diseases; aphids and spider mites appear now and then.
Good to know. Native to Florida south to Broward County. It does not tolerate salt or brackish water. Bees and other pollinators visit the flowers, and ducks eat the tubers.
Sources: Natives for Your Neighborhood (Institute for Regional Conservation): Sagittaria latifolia · NC State Extension Plant Toolbox: Sagittaria latifolia
