That's a nice setup Milehigh, I think your getting generative growth because tomatoes and peppers don't require much P to bloom/fruit. They like a nice balance of N and K though.
I really like the GH maxi series of dry ferts for my veggies, they're cheap and stable. much better than the fox farms I tried on my first run, which was a root rot disaster. I've got a book by Howard M Resh that has taught me a lot about veggie production.