Preparing your soil is important! If you skip it you'll regret it later! It's laborious but the pay off comes later so it's well worth the time and energy to get this part right. Why waste money on plants only to loose them later due to poor soil conditions?
Container Herb Garden that comes back year after year by growing perennial herbs: mint, Egyptian walking onions, saffron, rosemary, chives, marjoram, oregano, anise hyssop, sage, thyme,salad burnet, tarragon (French), chamomile, and arugula. Add in some annuals like basil, parsley, and cilantro and you have yourself everything you need for your kitchen.
How to grow watermelons: They do not like "wet feet" but they need at least an in of water each wk. You can trellis up watermelon plants, and once the plants set fruit, support the burgeoning melons with slings, which can be made with cheesecloth, nylon stockings, or old T-shirts. If the sling completely covers the fruit, it provides protection from insects. In addition to saving space, trellising improves air circulation and helps prevent disease.