Why Your 'Key Largo' Pepper Seeds Failed to Germinate

When pepper seeds refuse to sprout while tomato seeds planted alongside them thrive, the problem usually traces back to seed maturity. 'Key Largo' peppers turn red when fully ripe, and seeds achieve maximum viability only when the fruit is nearly overripe—almost to the point of rotting—at harvest time.

There's another factor at play: 'Key Largo' is an F1 hybrid variety. Seeds saved from F1 hybrids don't breed true. Even if your seeds had germinated, the resulting plants would likely differ significantly from the parent pepper in flavor, size, and productivity. The specialized parent lines used to create the hybrid don't recombine predictably in the next generation.

For reliable results, purchase fresh seeds from a reputable supplier each season. If you enjoy seed-saving experiments, stick with open-pollinated or heirloom varieties that will produce offspring similar to the parent plant.