The Seaweed 1L, that we use is Certified Organic & is extracted at lower temperatures than other products, meaning that more of the naturally occurring plant growth hormones remain active, it also contains Potassium Humate which comes from Gippsland in Victoria, described as 50 million year old compost, the best of its type in the world, containing a rich abundance of prehistoric minerals and trace elements. The seaweed comes from storm carst kelp freshly collected on the coast of Tasmania. Kelp is the grass of the sea-world, it contains many of the micro-nutrients necessary to sustain life.