The first hydroponic solutions for craftsmen formulated from the original recipes used at the legendary Seed Bank of Holland in the 1980s. #firstforcraftsmen For Dutch hydroponic master gardeners, growing is an art form. It is about long standing craftsmanship and the unique blend of art and science. To help them master their craft, Dutch breeders and growers swear by Reiziger for maximum flower and fruit yields with a full round taste. When you use Reiziger, you join the ranks of generations of Dutch craftsmen who know how easy it is to achieve rewarding growth rates.