09/23/2026
Here's what Tilva shared about fall seed saving:
Saving seeds from your fall garden is a rewarding way to practice self-sufficiency and preserve your favorite plant varieties for future seasons.
Here are some key tips for saving seeds:
- Choose the Right Plants: Focus on open-pollinated cultivars rather than hybrids. Seeds saved from hybrid plants often do not produce offspring that resemble the parent plant.
- Harvesting Techniques:
Beans and Peas: Allow the pods to mature and dry completely on the plant before harvesting.
Lettuce: Harvest seeds after the plant sends up a flower stalk but before the seeds are dispersed by the wind. You can rub the seed heads between your hands and use a sieve to separate the seeds from the chaff.
Tomatoes: Harvest seeds from ripe fruit. Because tomato seeds are surrounded by a gelatinous pulp, they require a fermentation process in a jar for two to three days to separate the viable seeds, which will sink to the bottom.
Flowers: Many flowers, such as zinnias, marigolds, and sunflowers, are excellent for seed saving. For sunflowers, allow the head to dry on the stalk, potentially covering it with a paper bag to protect it from birds.
- Drying: Seeds must be thoroughly dried before storage. A good test is to ensure they cannot be dented with your fingernail or that they snap/shatter when bent or hit. Spread them in a single layer on a paper plate or screen in a well-ventilated area out of direct sunlight for at least a week, stirring them daily.
- Storage: Store dried seeds in airtight containers (such as glass jars or plastic bags) in a cool, dark, and dry location. Label every container clearly with the plant variety and the date of harvest.
- Disease Prevention: Be mindful that some diseases can be carried in seeds. Avoid saving seeds from plants that show signs of illness to prevent introducing those issues into next year's garden.
To learn more about Seed Saving, attend our upcoming workshop on October 6: https://extension.psu.edu/landscape-design-and-native-seed-collection
Ask Tilva your other garden questions: https://extension.psu.edu/ai-assistant
Design a beautiful, sustainable landscape and discover how to select, collect, and propagate native plants for year-round interest and healthier outdoor spaces.