Sea weed is a great organic fertiliser, very versatile in your garden! Most of the world's oxygen, about 70%, comes from seaweeds and algae And Seaweed is one of the biggest carbon sequesters on our planet. See weed is a broad spectrum fertiliser jam packed with goodies! It’s full of hormones that are beneficial for your plants to thrive above and below your soil. Seaweed is a great mulch, is nice to work with, deters slugs, adds minerals and nutrients to your soil, and serves as a soil conditio