Seed Saving: Tomatoes

There are a couple ways to do this.

Seed Saving Instructions: Cross-pollination between modern tomato 
varieties seldom occurs, except in potato leaf varieties which should 
be separated by the length of the garden. Do not save seeds from 
double fruits or from the first fruits of large fruited varieties. 
Pick at least one fruit from each of several plants. Squeeze seeds 
and juice into a strainer and wash, spread on a paper plate and dry.

I ferment my tomato seeds as it gets rid of the gel that surrounds 
the tomato seed which is where viruses will lurk. I Squeeze the 
tomato pulp and seed into a glass jar, add water and stir well. Then 
let it sit and stir once a day for 3-4 days. The surface will get a 
white mold growing on it (this is a good thing, honest)and the bad 
stuff will float to the top and the good viable seeds will sink to 
the bottom. At the 3rd day, take the stuff off the top and toss in 
your garbage and then rinse the viable seeds again with fresh water 
and then drain and spread on a paper plate to dry. This really cuts 
down on any potential viruses.

tenzicut