Seaweed can bring a lot to a plant culture. They are natural and ecological biostimulants for plants grown indoors or outdoors. Seaweeds can be useful from the germination phase to the flowering phase. Seaweeds ascophylum, Kelp, Breton seaweeds, Norwegian seaweeds, here are the best seaweeds used in the different cocktails proposed by indoor culture, the leader of the bio stimulant, the seaweeds contain auxins, gyberilines, natural cytokinins, calcium, magnesium as well as all the oligo elements adapted to the indoor culture.