Hey guys, I'm new to the site and relatively new to gardening. I've always done a small garden beside my barn, but it soon became overgrown and tangled as I became more and more busy over each summer. This year I promised myself I would do better and I mustered up the resolve to build raised beds for the numerous benefits: assistance in organization, less weeds, good drainage, etc. I built 3 beds. Two that are 6' by 6' squares and one rectangular one that is 12' by 6'. The beds are 8 inches deep and I filled them with approximately 3.25 cubic yards of premium topsoil. I also began a compost pile. I live in Northwest Ohio, hardiness zone 6a. After I filled the beds with the soil, I began to fill them with plants. I began in early April, planting a decent amount of onion sets in the 6' by 6' beds (Yellow Sweet Spanish in one and White Superstar in the other.) Over time, I began to fill in the beds with various plants. I placed 2 salsa hybrid seedling tomatoes in each square bed as well as a variety of pepper seedlings and some herbs like cilantro and basil in one of the beds. I filled the larger rectangular bed with squash, zucchini, green beans, cucumber, kohlrabi, and some mint. I thought all was well until I noticed none of the plants were growing after habitual evening watering and weeding. In fact, the plants appeared to be dying. Many of the leaves on the tomato and pepper plants (pictures included of both) appear singed and wilting away while other plants appear yellow and stunted. The only thriving plant seems to be the onions as they've taken off. I planted a small strawberry patch behind my barn as well, not in a raised bed as I hope they take off, spreading runners that I will be able to propagate into new strawberry plants. I planted 10 and 9 of the 10 appear to be doing well. Anyways, what have I done wrong and what can I do to save the plants? Any help is much appreciated.