How to preserve seeds from fresh fruit to plant next year.
1. Choose the Right Fruit
• Use open-pollinated or heirloom varieties, as hybrid (F1) seeds may not grow true to the parent plant.
• Let the fruit reach full ripeness—or even become slightly overripe—so the seeds are fully developed.
2. Extract and Clean the Seeds
Different fruits require different cleaning methods based on whether they contain wet or dry seeds.
• For wet/fleshy fruits (like peppers, melons, and squash): Scoop the seeds out, wash away the pulp and juices in a strainer with water, and pick out any debris.
• For gelatinous seeds (like tomatoes): Squeeze the seeds and pulp into a jar with a splash of water, cover it loosely, and let it ferment at room temperature for 3 to 5 days until a layer of mold forms on top. The viable seeds will sink to the bottom; skim off the top layer, then rinse the good seeds thoroughly.
3. Dry the Seeds Properly
• Spread the clean seeds out in a single layer on a non-stick surface like a ceramic plate, parchment paper, or an unbleached coffee filter (avoid standard paper towels, as the seeds will stick).
• Let them dry completely at room temperature out of direct sunlight for several days. They are ready when they snap rather than bend.
4. Store for Next Year
• Place the dried seeds into paper envelopes or small coin envelopes and label them with the fruit name and date.
• Put the envelopes inside an airtight glass jar or metal container in a cool, dark location like a basement or refrigerator. Adding a silica gel packet helps absorb any remaining moisture.
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