What "F1" means

F1 stands for "first filial generation." It's the first-generation offspring of two different parent lines that have been crossed on purpose. Seed companies inbreed each parent for several generations until it's very uniform. Then they cross the two parents to make the F1 seed they sell.

How F1 seed is made

Pepper flowers usually pollinate themselves. To make an F1, the breeder has to stop that from happening:

  • By hand: open the flower bud before it sheds pollen, remove the anthers, and brush on pollen from the other parent. The flower is then bagged so stray pollen can't get in.
  • With male-sterile lines: some commercial breeders use a mother line that makes no viable pollen. That way they can produce cross-pollinated seed without removing anthers by hand.

Either way, the seed has to be made fresh every year from the same two parents. That's why F1 seed costs more, and why only the company that owns the parent lines can produce it.

Why you shouldn't save F1 seed

An F1 plant is uniform because every plant got the same mix of genes from the same two parents. Its own seeds are the F2 generation, and in the F2 those genes get reshuffled. Plants grown from saved F1 seed vary in size, shape, color, heat, and vigor, and few of them will match the plant you saved from. If you grow a hybrid, don't save its seeds. Buy fresh seed or a new plant.

Why WikiPepper doesn't favor them

Hybrids are bred for commercial traits: uniform fruit, big yields, and disease resistance for large growers. They can't be grown true from seed, so you're tied to the company that sells them. Meanwhile there are thousands of open-pollinated and heirloom peppers that come true from seed and can be shared freely. There are fine enough peppers out there that you don't need a hybrid.

They are the Fleshlights of the pepper world. They are the RealDolls™ of peppers. Go ahead and grow and eat them, but don't expect a baby.

Hybrids on WikiPepper

  • Notable F1 hybrids are welcome. Each one gets a note saying it's a hybrid, that you shouldn't save its seeds, and which company bred it (for example, Armageddon F1 from Tozer Seeds).
  • You can add your own hybrids, but you can't rename an established variety. An F1 keeps its F1 name.
  • Unstable crosses aren't wanted. That means home crosses that haven't been grown out until they come true.

Hybrid vs. stabilized cross vs. open-pollinated

  • F1 hybrid: a deliberate cross of two inbred lines. It's uniform in the first generation and doesn't come true from saved seed.
  • Unstable cross: an early-generation cross that's still segregating, so the plants vary. WikiPepper doesn't list these.
  • Stabilized cross: a cross grown out over many generations until its plants come true from seed.
  • Open-pollinated or heirloom: grows true from saved seed, as long as it isn't cross-pollinated by another pepper.