15,000 Calories Per Acre. Edible In 30 Minutes. Why Isn't This Plant Sold Anywhere?

Cattails (Typha latifolia) produce more calories per acre than most cultivated crops, yet you'll never find them in grocery stores. This documentary reveals why a 10,000-year-old Native American staple crop was erased from modern food systems, and how wetland drainage, perishability issues, and regulatory contradictions kept the "supermarket of the swamp" out of commercial agriculture.