The National Garden Bureau calls it High Density Gardening, but
the basic concept is squeezing as many plants as possible into
whatever small space is available. There are no excuses left,
particularly the one I hear the most, ''I don't have space to
grow vegetables.'' Unless you live deep in the woods where
sunlight is unheard of beneath a thicket of trees, you can grow
vegetables. All they need is water, soil and light, and there
are some vegetables that really don't need six to eight hours of
sunlight a day. If your space can grow grass and weeds, chances
are you also can grow lettuce, spinach, broccoli, cauliflower,
asparagus and onions. They may not be huge and lush producers,
but you will get something. But let's assume you do have a sunny
spot. That's perfect. You can grow vegetables quite easily and
without much effort. It just takes a bit of creativity. I have a
friend who plants a complete garden every year without digging
an ounce of soil. She plants directly in bags of compost. My
friend lays out