Saving seeds from fruits, vegetables or herbs is an easy way to save money if you are a gardener. Each year you recycle the seeds, the plants will adapt to your particular soil conditions, which means the quality of your plants will increase with each year. There is minimal work involved in saving seeds and it requires little more effort than driving to a store to buy seeds in a packet.
Cut the fruit open with a knife to get access to the seeds. If the seeds are large enough that you can easily remove them, take them out and put them in a large mixing bowl. If the seeds are small, mash the fruit up in a large mixing bowl, cover it with plastic wrap and let it ferment at room temperature for 4 days.
Fill the large bowl with water and stir it vigorously. The healthy seeds that are worth saving will sink to the bottom while the bad ones will float. Remove the floating seeds and discard them. This process is the same whether it is just seeds in the bowl or seeds with the mashed fruit. The mashed fruit will also float to the top.
Pour the water and healthy seeds through a fine strainer. Make sure the holes in the strainer are smaller than the seeds. If necessary, you can line the strainer with coffee filters.
Put the seeds under running water while they are still in the strainer. Scrub them with your hands to remove debris or plant matter.
Spread the seeds thinly on a clean cookie sheet. Put the cookie sheet near a sunny window. If possible, open the window and keep the cookie sheet on the windowsill. The constant airflow and warmth from the sun will ensure the seeds dry at a good pace.
Leave the seeds in the window for a week. If they still feel moist to the touch, leave them for an additional week.
Put the seeds in a paper bag. Label the bag with what type of seed it is and store it in a dark, dry place.