Pulled from the dizzying array of over 400 strains, here are the varieties that continue to be planted crop after crop. These greatest hits range from true Kushes to Skunks, Diesels, Citrus and Sour selections. They are the quintessential strains that laid the foundation for a new era of legal marijuana. Pulled from the dizzying array of over 400 strains, here are the varieties that continue to be planted crop after crop. These greatest hits range from true Kushes to Skunks, Diesels, Citrus and Sour selections. They are the quintessential strains that laid the foundation for a new era of legal marijuana.