2 cubic feet = 14.96 gallons, so you should be good. To my eye it looks like you may have started them in soil that is a little too hot (too much nutrient), and then over-watered. A lot of growers will start seed in a lighter mix with less nutrient. After two weeks, it is usually a good time to transplant into richer soil. The only problem with transplanting straight to 5 gallon pots is that you will flush much of the nutrients out of the dirt before the roots can even grow to it. It is true that transplanting causes stress, but it is my belief that this stress is offset by the roots being able to get to rich soil. With a consistent supply of fresh soil, you don't have to worry a whole lot about adding nutrients. Nutrients are where most new growers screw up there plants so take it easy and transplant into a 1 gallon pot first is my advice. If the leaves start to go dry and brittle, you officially over nuked them and will need to start over. Good luck!
Hang in there and keep us up to date.
