Research in the 1970s by John Jeavons and the Ecology Action Organization found that 4000 square feet (about 370 square metres) of growing space was enough land to sustain one person on a vegetarian diet for a year, with about another 4000 square feet (370 square meters) for access paths and storage – so that's a plot

Proteins. If you’re going to survive on a garden, you won’t be eating meat. While nuts are an excellent source of protein, nut trees take up a lot of space, so make sure you plant beans. Growing lima beans on poles will require about six square feet of garden per person. Snap beans will take about 10 square feet and soybeans will eat up about 30 square feet.

Carbohydrates. You’ll need some starch in your diet. The good news is that you have a lot of options. Beans will pull double duty here, in fact. Potatoes will require about 25 square feet per person, corn will require about 30 square feet per person, squash will need about six square feet, and peas need about eight square feet.

Vitamins. A complete diet requires a load of nutrients beyond protein and carbs, so plan on including stuff like spinach (eight square feet per person), broccoli (eight square feet), kale (one square foot), or cabbage (10 square feet).

Fruits. You can live on vegetables alone, but having some fruits is a great idea. Melons are great (six square feet per person), as are pumpkins (10 square feet), strawberries (10 square feet), and watermelons (six square feet).

Medicinals & Spices. Some plants don’t offer much nutritional value, but make life a lot better by providing seasoning or health benefits. Some examples include cilantro (one square foot per person), garlic (four square feet), onions (eight square feet), and mustard (two square feet).
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