The future of coating is here... Organic coating by Ad Terram Lettuce Customer trial in Yuma (Arizona) USA.The seeds are treated with our Sapphire Seed Coating Premix. Lettuce chemical treatedLettuce treated with Sapphire seed coat Premix Previous Next We are an innovative company focusing on the research of own developed organic treatment products and technologies in the agro-industry. We make high-end products which are 100% organic.