Quick Answer
To test seed viability using the paper towel method, place seeds between two damp paper towels, seal them in a plastic bag, and store in a warm, dark place for 7-10 days. Check for germination by observing root growth. Count the number of seeds that have germinated to determine viability.
Understanding the Paper Towel Method
The paper towel method is a simple, non-destructive test for seed viability. It involves placing one or two seeds between two damp paper towels, sealing them in a plastic bag or airtight container, and storing in a warm, dark place, typically with temperatures between 70°F to 90°F (21°C to 32°C). The ideal humidity level is around 90%.
Preparing Seeds for Germination
Place the seeds between two damp paper towels, making sure they don’t touch each other or the container. Seal the bag or container and ensure it is airtight. Label the bag with the seed type, date, and any other relevant information. Store the bag in a warm, dark place for 7-10 days. Check the seeds every 2-3 days to ensure the towels remain damp but not waterlogged.
Interpreting Results
After 7-10 days, carefully open the bag and observe the seeds for root growth. Count the number of seeds that have germinated and calculate the viability percentage. For example, if you start with 10 seeds and 6 germinate, the viability is 60%. This method is not suitable for all seed types, as some may require specific germination temperatures or light conditions. However, it is a reliable method for testing viability in many open-pollinated and heirloom varieties.
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