Using seaweed as a natural fertilizer has been known about for a long long time, and seaweed "farming" has been occurring since at least the 70's [1]. The farm

Using seaweed as a natural fertilizer has been known about for a long long time, and seaweed "farming" has been occurring since at least the 70's [1]. The farming in this case is less "planting new crops" and more "harvesting crops that already exist in the wild, in a sustainable way." Coastal communities where I grew up would regularly collect washed-up seaweed, and then bury it in the garden. But as the article points out, while the properties of seaweed are well known in some places, to most Americans it's a pretty unknown resource. [1] https://kelpakusa.com/ https://kelpakusa.com/