Beginner Gardening: brown curling leaves on everything, 4 by brownthumb78

brownthumb78 wrote:
This is my first year with a vegetable garden. I live in Clearwater Florida & since we have sand (not soil) I bought miracle gro vegetable soil. I planted squash, peppers, beans, asparagus, tomatoes, herbs, & some flowers. They grew well for a couple months but now they seem to be dying. I have no idea why. I water daily cuz its hot & started using miracle gro liquafeed weekly. The leaves are yellow, brown, curling & everything is droopy. I really want to do well. What am I messing up?