Growing tomatoes, etc. --lining raised beds?
I am building an organic garden here outside Orlando. I've heard that leafy greens will grow, but forget tomatoes. I'm used to gardening in PA, where we grew too many tomatoes and zucchini. The few attempts I've made here have produced a tomato or two and spindly weak zucchini plants that die. Our sandy soil has few nutrients-- I've been adding compost, coffee grounds, and other soil ammendments. But from what I've heard from other gardeners around here, all of that will quickly wash right away when it rains. Any ideas how I could line the beds to keep that from happening? Plastic with holes, landscape fabric or newspaper? Something else?
I tried growing tomatoes right in a bag of black cow manure. It was OK, but not great. Any other ideas?