If you are thinking about starting a vegetable garden or making a new flower bed, you need to think location, location, location. The amount of sun or shade in a certain location will determine what you can grow.
Most veggies need full sun. In my Zone 7a garden, lettuce can be grown a little longer with some shade as opposed to full sun.
The same goes for spinach and arugula. Summer favorites like tomatoes, squash, and corn love the heat so full sun is a must.
Different shrubs and perennials also have varied light requirements. Hydrangeas, for example, prefer some shade. Amsonia prefers full sun. The key is to know your site and know the requirements of the plant.
For more info, check out my blog post Planning Your Garden
Brenda/aka The Blonde Gardener