First, cut a tomato in half, then squeeze the pulp onto a paper towel and spread the seeds around so that they are spaced apart on the towel. Let them dry in a warm sunny place for a few weeks. A window sill is perfect.

 

Once they are dry, cut the paper towel into squares with a few seeds on each piece and store in a jar.

 

When you’re ready to sow the seeds, sow each piece of paper towel in a pot and cover with soil.