Hybrid vigor, or heterosis, is a well-known effect in plant breeding where first-generation crosses grow faster and stronger than either parent. Growers who plant indica hybrid seeds often see this in the form of thicker stems, larger root mass, and heavier yields compared with landrace lines. The effect tends to weaken in later generations unless the breeder stabilizes the cross. Checking whether a strain is F1, F2, or fully stabilized helps set realistic expectations.