F1 Generation: The first generation of hybrid seeds is referred to as "F1," where "F" stands for "filial," meaning offspring. F1 hybrids usually exhibit what’s known as "hybrid vigor," meaning they often grow better or stronger than either of the parent plants. Germination Time: Pumpkin seeds usually take 7-10 days to germinate under the right conditions. If you’re growing pumpkins outdoors, make sure the soil is warm enough for faster germination. You’ll notice small green shoots emerging from the soil once the seeds have germinated.