Save seeds from tomatoes that are fully ripe, but not over-ripe.
Save seeds from your favourite varieties, choosing your best for seed.
- Slice tomato across the middle.
- Squeeze tomato seed and surrounding gel into clear glass or plastic container, labelled with variety of tomato and date.
- Cover seed with 2 to 3 inches of water.
- Allow seed/water to sit 2 to 3 days, until mould forms on top of water. This is a sign that the gel coating that surrounds the seeds has broken down.
- Remove mould, water, and any floating seeds (these floaters are bad). Place remaining seeds in fine-mesh strainer.
- Rinse a few times, dislodging any gelatinous material surrounding seeds.
- Allow seed to dry in single layer on paper plate (labelled with variety of tomato) or similar material.
- Allow seeds to completely dry for several days.
- Once dry, store in envelope in cool, dry place for up to 4 to 7 years.