How to Save Tomato Seeds for Next Year

Overview

Fruits and vegetables such as cucumbers, squash and tomatoes are best saved through what is called the wet method. This way of saving seeds will remove any viruses held by the tomato seeds. It will also easily remove the pulp surrounding the seeds.

Step 1

Choose the best tomato to use for saving seeds. Slice the ripe, mature tomato across the middle, with the stem at the top. Scoop out the pulp, where the seeds reside and place them in a container. The seeds should be a yellow color. Discard any green seeds because they will not germinate when planted next year.

Step 2

Add about a quarter cup water and cover the container with clear plastic wrap. Poke several holes in the top of the plastic for air circulation.

Step 3

Place the container with the tomato pulp in a warm location, such as the top of the refrigerator or a sunny window sill. The fermentation process will be completed within two to three days. The surface will have a scummy appearance when the seeds are ready.

Step 4

Stir the tomato pulp mixture once a day and then replace the plastic wrap. This fermentation process kills any viruses or diseases that may reside within the seeds.

Step 5

Remove the plastic wrap. Spoon off the scummy surface and throw it away.

Step 6

Remove the tomato seeds into a coffee filter. Rinse them thoroughly.

Step 7

Place the seeds onto a paper-towel-lined dish in a single layer, and put it in a safe place to dry. Stir the seeds around occasionally to make sure all sides are drying. The complete process will take about a week. You'll know they are dry when they are not sticking to each other anymore. It's better to leave them out a bit longer if you are not sure they are completely dry. If there is any moisture, they will mildew and rot in storage.

Step 8

Store your dried tomato seeds in paper envelopes or packets. Label the envelope with the name of the variety of tomato and the month and year the tomato seeds were saved. You can add any additional information you feel is pertinent. Place your seeds in a cool dry location where pests, such as mice or squirrels, can't get to them.