I bought a tomato at the store and squeezed the seeds onto a
paper towel. After they dried, I cut the paper around the seed
and planted them in good potting soil. Keep damp and you will
have tomato plants in about a week. I tried planting seeds
immediately after squeezing the tomato and they did not grow, so
you must dry the seeds. I had an older tomato and I wanted to
get out the seeds. I filled a bowl of water and squished the
tomato under the water. All the seeds were in the water. I threw
the tomato part into the compost pile and the water and seeds
into my indoor growing houseplant bowls, or out into my garden
area where I try to grow seeds from scratch. It was really easy,
and they were watered at the same time they were planted. Later
I will throw a few egg shells over them so when it rains, it
will give them calcium and also to keep the birds from eating
the seeds. When saving tomato seed for growing your own plants,
simply put the wet seed on a paper towel and let them dry. When
you are ready to plan