How do I test if seeds are still good?

Testing seed viability helps avoid wasted garden space and disappointment at harvest time. As an expert in seed longevity, I perform germination tests every winter after losing entire rows due to expired seeds. Simple paper towel tests show viability percentages, allowing you to adjust the planting density or discard seeds that do not perform before spring arrives.

Temperature control is vital for obtaining reliable results. Most seeds require a consistent temperature of 70-85°F (21-29°C) during testing for germination to occur properly, and I use seedling heat mats with thermostats to ensure the temperatures are right. If temperatures are cool, germination is delayed, and results will be inaccurate, which I learned from hybridizing pepper seeds on a windowsill.

Record Keeping guesses out of your testing in science. Keep a garden journal with results that also track the variety, age, and germination percentage. After a decade of records, I've learned that tomato seeds decline consistently, like clockwork, after year 3. While this doesn't have any significant value for me, it allows me to predict when I will need to replace seeds well in advance of the planting season.

Use alternative methods for hard-coated seeds, like morning glories. Scarify the tough seed coats with sandpaper before testing, or soak overnight in warm water. I increased my viability from 40% to 80% on sweet pea tests after following these pretreatment procedures.

Begin testing your seeds now. The plain paper towel method takes only minutes to complete and saves months of wasted effort. My garden production increased by 30% after implementing regular viability tests, along with notable improvements in garden health. Know before you grow, for guaranteed gardening success.

Read the full article: 5 Essential Tips: How to Store Seeds Properly