I have a planting chart from a seed company I order from with recommended fall planting dates (varies depending on what veggie it is).

I am growing seedlings under a grow light to transplant for fall harvest. According to the chart for napa cabbage you should transplant them out around July 25th, and they should be about 2-3 weeks old.

Should I repot it to a larger container? I heard napa doesn't like to have it's roots disturbed and it's in a 2" nursery pot. It's not a peat pot/cow pot either, just a small, square plastic nursery pot w/holes for drainage.

I am growing napa cabbage under a grow light; it's about 1 week old. It has one set of true leaves. It started to put on the 2nd set of true leaves, and was growing vigorously, but now it doesn't seem to be doing anything.

I'm going to fertilize using a liquid fish fertilizer; it will be applied at quarter strength (1-1/2 teaspoons of fertilizer per gallon of water).

How often should I fertilize the seedlings?