• Scientific name: Sagittaria platyphylla
• Synonym: Sagittaria graminea var. platyphylla; S. recurva
• Common name: Giant sagittaria
• Family: Alismataceae
• Group: Aquarium plants
• Max height: 30 cm
• Distribution: North America, Southeast
• Habitat: In stagnant or slow-moving water
• Substrate: Nutrient-rich
• Placement in aquarium: Middleground to background, can be planted as a group or individually.
• Planting density: 4-5 plants for 15 cm²
• Lighting needs: Very bright
• Temperature: 20-28 °C
• pH: 6-7,5
• Hardness: 2-14 NK°

Description: Despite its common name, this plant is a low-growing foreground plant. The "giant" refers to the leaf thickness (up to 1,5 cm) which is greater than is other similar species. This plant is easy to care for, but requires bright lighting and a good supply of iron, either in the water or in the substrate. With time and space, the plant will produce a dense "carpet" across the aquarium floor. Successful cultivation requires a not too high temperature (about 20-24 °C), intensive lighting in a free standing location, as well as a nutrient-rich substrate (additional supply of loam). Good water movement seems to enhance growth. Soft or medium-hard water with a weak acid pH-value is optimal. Propagation through runners is rare, however, it will produce small tubers. Store these in cool water for a couple of months before planting them in the aquarium. It can be used in garden ponds during summer.