A wetland perennial that spreads in colonies and is grown in shallow water for its starchy tubers, which taste like potatoes. Care centres on keeping the roots wet or submerged.
Family
Alismataceae (Alismat family)
Grows as
Bulb
Light
Full sun
Water
Keep the roots constantly wet, grown in 15 to 45 cm of still or slow water.
Soil
Muddy or silty pond-bottom soil, fertilised with decomposed manure.
Temperature
Temperate; hardy in most cold-winter climates, tubers survive freezing in mud.
How easy
Easy
Safety
Not known to be toxic
Edible
Yes, some parts
Native range
Canada to C. & E. U.S.A., Cuba, California to W. South America
Climate
temperate
About
Sagittaria latifolia is a wetland plant in the family Alismataceae, native to North America and northern South America; common names include broadleaf arrowhead, duck-potato, Indian potato, or wapato. This plant produces edible tubers that have traditionally been extensively used by Native Americans.
How to grow it
This plant is easily cultivated in 0.15 to 0.45 m (6 to 17+1⁄2 in) of water with no or little current. The tubers are planted well spaced (no more than 12 plants per square meter) at the end of May at a depth of 5 to 7 cm (2 to 3 in). Fertilize with decomposed manure. They can be multiplied through seeding or division in July. The starchy tubers, produced by rhizomes beneath the wet ground surface, have long been an important food source to the indigenous peoples of the Americas, along with those of S. cuneata. The tubers can be detached from the ground in various ways: with the feet, a pitchfork, or a stick, and after digging up, the tubers usually float to the surface. Ripe tubers can be collected in the autumn, when they are also often found floating freely.
Where it grows
Sagittaria latifolia is native to southern Canada and most of the contiguous United States, as well as Mexico, Central America, Colombia, Venezuela, Ecuador, and Cuba. It is also naturalized in Hawaii, Puerto Rico, Bhutan, Australia and much of Europe (France, Spain, Italy, Romania, Germany, Switzerland, the Czech Republic, and European Russia). In Mexico, it is reported from Campeche, Nayarit, Tabasco, Tamaulipas, Puebla, Jalisco, Durango, Tlaxcala, Estado de México, Veracruz and Michoacán.
Uses
The starchy tubers were consumed by Native Americans in the lower Columbia River basin, in addition to the Omaha and Cherokee nations. The tubers can be eaten raw or cooked for 15 to 20 minutes. The taste is similar to potatoes and chestnuts, and they can be prepared in the same fashions: roasting, frying, boiling, and so on. They can also be sliced and dried to prepare a flour.
Text excerpted from the Wikipedia article Sagittaria latifolia by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.