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Testing 1,2,3: How to do a Seed Germination Test

I know I’m not the only gardener who can’t bear to part with her unused seeds. Sometimes, we buy packets and don’t end up using everything inside. Getting rid of them just feels wrong, even if the packet is a few years past its expiration date. As I prepare to start my seeds for the upcoming growing season, I’m discovering an unhealthy amount of old seeds in my collection. Are these seeds still any good? What’s a girl with attachment issues to do? 

Option #1: Wait it out

Your easiest option is to just plant the seeds and see if they sprout. But as seeds age, their germination rates drop. They also may not pop if they weren’t stored properly, and some seed varieties have an actual shelf life and won’t do well beyond that timeframe. 

Option #2: Seed Germination Test

Why take the wait-and-see approach when you can find out if you’ve still got viable seeds within the next week? In her book Garden Alchemy, Stephanie Rose of Garden Therapy recommends an easy seed germination test to find out if you’ve still got the goods. 

Do this test if you have seeds that are more than a few years old or that you’ve collected yourself. You may save yourself time, effort, and disappointment if the seeds don’t sprout. Start this process at least a week before the official seed starting date. 

Seed germination test

How to do a Seed Germination Test

You will need:

  • 10 seeds
  • Paper towel
  • Plastic Bag
  • Spray Bottle
  • Label

Instructions:

  1. Fold a paper towel in half and wet it with the spray bottle. Place 10 seeds inside the fold of the paper and cover.
  2. Put the paper towel inside the plastic bag and partly close it; do not seal it completely. The seeds will need some airflow, or you’ll be growing mold! Label the bag with the seed variety and date of the experiment. 
  3. Place the bag in a warm spot. Rose recommends the top of your fridge. 
  4. Check the seeds daily for signs of activity and lightly mist them with water. Depending on the variety, you should start seeing them open up within three to ten days. 

sprouting seeds

Evaluating the Test Results

If all of the seeds, or more than 85%, sprout, you won’t have any issues and can depend on them for this growing season. If your numbers are low, either plant more seeds to increase your chances of success or rip that band-aid off and say goodbye for good. It’s over, and you have to accept that. 

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Author

Catherine Sherriffs

Editor at Garden Culture Magazine

Catherine is a Canadian award-winning journalist who worked as a reporter and news anchor in Montreal’s radio and television scene for 10 years. A graduate of Concordia University, she left the hustle and bustle of the business after starting a family. Now, she’s the editor and a writer for Garden Culture Magazine while also enjoying being a mom to her three young kids. Her interests include great food, gardening, fitness, animals, and anything outdoors.