Any reputable seed compost

Most seeds need a compost with very little fertiliser when sown, in fact, too much feed and this will inhibit germination. So choose a seed compost. In fact, I sow all my seeds in vermiculite which has no feed at all, as it's easy to prick the plants on once they have germinated.
Your plants will need feeding with a good liquid feed once the fruits form and begin to swell. That is the time to give them a balanced feed of nitrogen and potassium. I think you can't beat a home-made liquid feed made with nettles or comfrey leaves which have been rotted down in water for a few weeks. Or you can buy something in a bottle from a garden centre which will cost you a lot of money to achieve the same effect.

Bertie is spot on with his advice