Saving Seeds from Tomatoes

Posted by Jamie Oberdick on 09/09, 2011 at 12:11 PM

First, take one of those awesome tomatoes and cut it in half across its middle. Then either use your fingers or a spoon to remove both the seeds and the gooey stuff, and place them in a clean cup—a plastic cup is fine. Then add 2-3 tablespoons of water, and cover the cup with plastic. Make sure you slit the top of the plastic—air flow is vital here.

The reason you need air flow is because you want to encourage fermentation. Why are you fermenting the seeds? Because the process kills any disease that may be in the seeds.

Once you have done this, put the cup in a warm location like a sunny windowsill, out of the reach of curious kids or cats. Every day you want to stir this nasty little soup. You will notice a film forming on top,  and that’s great. This is the fermentation process taking hold.

After 2-3 days, remove the film on top and pour the contents into a small strainer. Warning: the smell is, well….quite awful, so don’t inhale too much. Give them a good rinse, tapping the strainer to shake off access water.

Get a plate and put a coffee filter on it. Dump the seeds onto the coffee filter, spreading them out to get them as close to a single layer as you can. Then put them in a place where they can safely dry. Drying time can take a week, or more than a week in rainy weather. Once a day, stir the seeds around to ensure complete drying. They are dry when they no longer stick together when you touch them.

Next, find something to put them in, such as a small envelope. You can buy little envelopes at an office supply store that are perfect for this purpose.

That’s it! Now you have seeds for next year. One final tip: filling a little envelope with a handful of tomato seeds makes a nice holiday gift for your favorite gardener.

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