Quick Answer
If seeds don't germinate after saving, it may be due to improper storage conditions, seed quality issues, or insufficient moisture during germination. To troubleshoot, examine the seeds for visible damage or signs of mold, and check for proper storage conditions such as low humidity and consistent temperatures. Consider testing a small batch of seeds to confirm viability.
Assessing Seed Quality and Storage
When saving heirloom seeds, it’s essential to store them in a cool, dry place to preserve viability. Aim for a temperature range between 35°F and 45°F (2°C and 7°C), and maintain a relative humidity of 30-50%. Store seeds in airtight containers, such as glass jars or plastic bags, to prevent moisture from entering. Proper storage can extend seed viability for up to five years.
Testing Seed Viability
To determine if the seeds are the issue, test a small batch using a simple paper towel method. Place 10-20 seeds on a moist paper towel, fold it over, and seal it in a plastic bag. Place the bag in a warm location, such as a sunny windowsill or a greenhouse, and check for germination after 7-10 days. If the seeds fail to germinate, consider purchasing new seeds from a reputable supplier or trying a different storage method.
Re-germinating Seeds
If the seeds are still viable but haven’t germinated due to insufficient moisture, try re-germinating them using a moist paper towel or a germination tray. Soak the seeds in water for 24 hours, then place them on a moist paper towel or in the germination tray. Keep the environment warm and humid until germination occurs. This method can be effective for seeds that are on the verge of germination but need a bit of encouragement.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.