Remember when your parents used to grow their veggies with kelp seaweed? Yes? No? Maybe?
Anyway; there's a great reason for it. Seaweed is high in carbohydrates, making them a great source of food for plants. It's also low in in cellulose, so it breaks down really easily. An organic meal of kelp seaweed is the perfect source of nutrients for a vegetable garden, and the same goes for your lawn.