BIG HEAD SEEDS - Curators of Superior Genetics. For the past 20 years Big Head has collected the best of the best plant genetics from around the world and bred what they consider to be some the finest quality cannabis strains available nowadays. Their herbs are the culmination of years of research and exploration. Their mission is to discover grand plants and the people who understand their individual properties. We are delighted to announce the welcome arrival of Big Head Seeds at The Attitude Seed Bank.