F1 hybrids are the first generation seeds/plants resulting from a cross mating of distinctly different parental types, the offspring of which produce a new, uniform seed variety with specific characteristics from both parents. Crossing specific parent plants produces a hybrid seed (plant) by means of controlled pollination. To produce consistent F1 hybrids, the original cross must be repeated each season. As in the original cross, this is done through controlled hand-pollination, and explains why F1-seeds are so expensive.