Fertilize or add compost in the spring when prepping garden for planting. When plants start blooming side dress with 15 30 15 plant food. Walmart usually has some all purpose stuff labeled for fruits veggies etc.
You can also side dress agains, when produce is starting to grow. About 3 times is all I usually have to do, but I sprinkle slow relese stuff in or around the transplants/seeds in the spring so that kinda fills in the rest of the time.
Plants have to have nutrients to grow, but follow the directions on the packages, and watch out for the nitrogen balance/ratio with the other nutrients.
Thanks for the fertilizing instructions! That helps. I have printed out your comments for my files!