Extract tomato seeds

Gardening / Plants


I've been working on a tomato project for a year now. I ordered the very weak but tasty variety Berner Rose on the internet. I planted it in the spring and was able to harvest the first seeds a few days ago. I need these to refine them with another variety. But I won't write anything about it until I have implemented it. With biological projects you have to bring a lot of time and patience with you. In this article I describe how to harvest the seeds from a ripe tomato.


To be able to work at all we need a ripe tomato. We pick this tomato from the shrub we have planted ourselves. Purchased tomatoes cannot be reproduced in most cases, because they have been grown in this way by the large corporations. However, there are enough traders on the Internet who offer tomato seeds. These do not cost much and the planting is also not difficult. You can do this quite well with your children and teach them how to take care of a plant, as tomatoes need a lot of care and water. If you grow your own tomatoes, you should avoid fertilizers and let the plant grow naturally.

Otherwise we need a sharp kitchen knife, a preserving jar, a small spoon, sieve and blotting paper. These are all tools and materials found in the household and you don't have to buy anything extra for this project. Blotting paper is mostly found in primary school exercise books (if it is still used today at all). For a preserving jar you can also use a plastic can as a replacement. The tomato seeds don't stay in there for a long time and nothing gets moldy.


First we cut the tomato in half. I do that on a sheet of paper. But you can also do it on a wooden board or the sideboard in the kitchen. Where there is space right now. There is not much to consider except that you should not cut yourself.

Then place the preserving jar in front of us and take the tomato in your left (or right) hand. With the right (or left) hand we take a spoon and scrape the innards out of the tomato. Everything comes into the glass except for the skin. We can eat them (if we have washed the tomatoes beforehand). I promise you that they will taste very delicious.

After we have scraped both halves we fill a little tap water into the glass. After three days the fruit pieces will float on top and the seeds will lie on the bottom. We put the glass in the fridge or in another cold dark place.

After three days we pour the tomato paste into a sieve and hold it in the sink. There we wash away so much of the pulp. A small teaspoon is very good for scraping. We take care not to crush the seeds and therefore work very carefully.

Now we can take as many seeds as possible out of the sieve and put them on the blotting paper. So that we can count later better how many seeds we have, we put them neatly in a row. We also write what kind of seeds they are, because they can last up to five years. However, after drying for 2-3 days, they must be packed in a dark paper bag. Next spring (2019) we will sow them again and cross them with another variety.