Sour Crinkle AutoGenetic Heritage Sour Crack x Grape Crinkle Seed Type F4 Feminised Automatic Indica Sativa 80 20 Cycle Time 60 to 70 days from sprout Sour Crinkle Auto is an 80% indica hybrid strain bred from Sour Crack and Grape Crinkle genetics. Sour Crinkle Auto is an F4 strain which means the it displays greater homogeneity than an F1 strain but is not yet established as a true breeding variety. Sour CRinkle Auto is a veritable trichome and terpene factory. It