The term F1 stands for Filial 1. It is often used to
describe seeds. An F1 seed is produced from two known varieties of
plant. The same two varieties are always used to produce the F1
seed. The seed produced always has the same characteristics. If you
grow a plant from an F1 seed the plant will always be exactly the
In almost all cases it is not possible for the amateur
gardener to produce F1 seed. Two F1 plants cannot be used to produce
the same F1 seed.