Chemryder 91 was put together to establish a powerhouse Auto from the Chem 91 cut I have held for years. I crossed the initial Chem 91 with a Lowryder 2 male, then hunted the best selections out of a few hundred seeds and chose the females that best inhibited pistils and flowering at 3 weeks. After choosing the 2 best males from the f1 stock, and the best female, I then made the cross into an F2 before releasing. Chemryder 91 f2 is Chemryder 91 f1 x Chemryder 91 f1). Super dense Chem 91 spears and colas, quick veg growth, moderate yield but excellent potency.