Not much. Truthfully, it depends on the types of veggies you want to grow and how many. But you'll want to know what you have to work with before you choose your vegetable seeds or seedlings. For example, if your kids really want to grow giant pumpkins, a good-sized part of the yard or a large raised bed could easily be devoted to pumpkins. But, one thing is for sure, you absolutely do not need what is referred to to as "land" to plant a vegetable garden. Not even close.
Read More At: Vegetable Gardener