Look into pairings of vegetables that grow well together and those that don't.
For example, if I remember correctly, onions , carrots and tomatoes grow well together. Certainly onions and carrots do. Pole beans like strawberries, and potatoes like ? Wish I could reemmber.
The native Americans grew things in triads of : corn , pole beans to grow up the corn, and squash at the base. They would build mounds, put three dead fish in the middle for fertilizer, plant a handful of corn and some beans and then have only one, or at most two squash plants.
Tomatoes can grow along the ground, too, if the climate is dry. Potatoes LOVE to grow in old tires piled up and filled with soil.
Again, not sure if your area is too hot for that , though.