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Advanced Seeds is a Spanish Cannabis Seedbank who has a reputation for breeding superior marijuana genetics. Specializing in reg and fem Skunk and Kush hybrids, crossed with the more potent American and Dutch pot seed strains, for example, Diesel, Ice and Jack Herer lines, they also produce auto-flowering cannabis seeds. Advanced seeds produce all of their marijuana seeds using organic cultivation methods with only natural fertilizers and pesticides being used in cultivation. Their seeds are bred under strict controls in isolated rooms to ensure the identity of each variety and they use a completely safe method to obtain feminized seeds without any kind of genetic manipulation.