Search fonction didn't turn any explanations of the ''f'' thing seeds.A link to some good and simple explanations would work too if you have one!
Ok! But got more questions! If you're making feminize autoflower seeds,how can you rebreed them to get to f2,f3, if only get female plants?
F2 displays more variation because of the interaction between dominant and recessive genes.This refers to generations of rebreeding.
F1 is first generation.
F2 for some reason is commonly where phenotypes pop up.
Large F numbers tend to be more stable.