Edible seaweeds provide a sustainable source of healthy food and ecosystem services, including habitat for marine animals, oxygen for life, and uptake of excess nitrogenous wastes. Cleaner waters in NYC and advances in ocean farming make this a good time to make edible seaweeds part of local food. Our goal is accomplishing a critical step towards this goal, namely, determining a key growth parameter (nitrogen loading) in a micro nursery for the edible seaweed nori.