"Blue has always been my favorite color, but I had never thought about making it the basis for my garden," says Verla Ledlow. After the Loxley, Alabama, native finished painting her bench, she painted a pot and then another. To her surprise, the garden she had always wanted began to emerge. "I based all of my decisions on the color blue, and the act of making choices became a lot easier," says the seasoned gardener. Here are her guidelines for success.