As the old saying goes, never go grocery shopping when you’re hungry. That might be fine advice for the wallet and the waistline, but for your garden, your deepest winter craving for color means it’s feeding time. That’s when some of the best winter plants like to grow. I learned my best lessons about winter planting from the exquisite local garden of the late Jane Platt. A master illusionist, Platt knew how to create a sense of deep space where there was none, layering textu...