This tiny potting-shed of a shop caters to Golden Triangle condo dwellers whose plot of land consists mainly of a lanai. Sometimes two. So the colorful patio at Diane Stahl's Urban Roots displays dozens of planter-worthy herbs, annuals and vegetables, twining vines, rosebushes and perennials that will winter over in a balcony pot. Inside, you'll find a few well-chosen books, sturdy tools, seeds and bulbs, watering cans and other accessories designed to doll up small spaces. And she doles out some very sage watering and growing advice. May your porch flower over.