Feeding young plants?

[Goldie321]

My tomatoes seedlings have just been put into peat pots from the starter trays to start their real growth and I'm wondering if they should get any type of fertilizing at this stage. If not, when do you start feeding them, what kind of fertilizer and how often? I've usually bought my plants and am really new to starting from seed. I'm in west central Florida so the trays are outside (high temps around 80 and overnight lows bottoming out around 50 or a little higher) on the deck getting indirect sunlight most of the day (morning more direct).