How would you like a perennial that is hardy from USDA zones 3 through 9, tolerates browsing deer, drought, and smog, while attracting butterflies with its brilliant flowers? Moss phlox (Phlox subulata, also known as moss pinks and creeping phlox, does all that, and more. A very low growing groundcover that barely reaches six inches in height, moss phlox spreads to a diameter of two feet, making it ideal for the front of a border. The leaves resemble short, prickly pine needles, and are a gray-green in color. But it’s the flowers that cause me to run to the garden center for more.