You'll be surprised how fast they grow! You still have half a month of July and all of Aug and Sept! Most pepper take 65-70 days to maturity, so even if you put in transplants in Early July you are likely still going to get some peppers by Fall! Don't worry, your plants look great!

I think too that in zone 6 in NJ, your peppers and eggplants will have mature fruits well before the end of season. Right now is the beginning of summer and plants can do wonder during hot days of summer, if well watered.
However, too much fertilizing postpone fruiting and instead will give you beautiful foliage.

P.S.
== Some peppers have naturally light green leaves, not because of nutrients deficiency.
== I would mulch the top to maintain moisture better.