Growing plants vertically is one of the best space saving methods. Winter squash, cucumber, beans, watermelons, peas, tomatoes and small pumpkins can easily be trained up trellises or other supports which will save you loads of space in your garden. 

Many of the common herbs like thyme, sage, basil, rosemary and parsley can all be planted very close together. Even better, plant these drought-tolerant herbs in containers and tuck them into a small nook of your garden or even hang them.

What about vegetables? Plant these smaller veggies to conserve space: carrots, leaf lettuce, radishes, beets, turnips, mustards, garlic, spinach and chards. Again, you can plant all of these vegetables in containers as well.

So go ahead and maximize your gardening space by utilizing every nook and cranny.