Barbara welcome !
If you have not grown tomato before, trying to grow it indoor is NOT a good idea. Tomato plants are not house plants. They need natural environment, they grow fast ..on, and on.. Some people (experienced) do it under artificial light indoors. To me it is just too much work.
So, your best option, IMO, is to try growing them in the garden. If you don't have a garden spot, container growing in a patio, balcony with minimum of 4 hours direct sun is your next best option.

Now you decide where you want to do it (container/pot or in ground) then you will get advice as how to do it.

Sey

Barbara, welcome. It's really not that complicated, honestly.

What part of the world do you live in? If it's summer where you are, I would not bother growing indoors. Pick up some tomato plant starts at the store or nursery.

By "recipient" do you mean what kind of container, or mix? If you grow outdoors, you can either put them in the ground or containers, depending on your situation. Tell us more about where you live and your garden space, and we can give more advice.

Thank you for answering! I live in Belgium, it is the summer so I could grow it in my garden.

And for the recipient I ment a container, Or is it better to let it grow directly from the ground?

And what should I do next? I bought some seeds from a garden market, Should I mix it with a special mix?

Thank you,

Barbara

Barbara,
Starting from seeds is a long and complicated process. Under good conditions (light temperatures) it will take upward of 45 days to grow something that can be planted out in the garden.
I would recommend that you go to some nurseries that are selling plants, that can be planted in appropriate time. That is when the danger of frost is over and the night lows are 5C or higher .The places that sell plants should be able to tell you when you can plant out.
Good luck and wait for more ideas and recommendations/advice.

Sey

Agree. Tomatoes in the home garden are grown from transplants, not by direct seeding. You can grow your own transplants indoors if you start at least 6-8 weeks prior to the plant out date. Or you can just buy the transplants for planting in your own garden. That is what most people in the US do.

If you have a choice of planting in the ground then that is best IMO. Containers can work well IF you invest in a large enough container. How well the container will work depends on the variety of plant you get. With over 5000 different varieties of tomatoes there are plants that will range from 1 foot tall to 12 feet tall and from 1 foot wide to 6 feet wide. So the typical "flower pot" will not work.

Dave

Hi Barbara, I agree with Sey and Dave. Save the seeds for next year; they will still be good. For this year, go back to the garden market and try and find some small tomato plants.

Put them in the ground if you have an appropriate space. If not, use containers at least 40 liters. If you use containers, get some potting soil as well. I would also look for some fertilizer you can mix with water, and also some stakes or tomato cages for support when the plant gets big.

That's really all you need to start! Good luck and keep us updated.

On a side Note:
I am growing a tomato variety of Belgian origin. It is called Ananas Noire (French name = Black Pineapple). It is my favorite tomato. I have 3 plants growing.

On the plant size: get one that is about 15 to 20 cm tall. That is the optimum economical size for planting.Also make sure that the fertilizer you use has Calcium and Magnesium in it ( in addition to N,P,K ), IF you intend to plant/grow in container. In the garden, your native garden soil might be rich in Ca and Mg already.

Good luck !

Sey