Easy, happy and of course, lucky, oxalis delivers for newbie and seasoned gardeners alike. Add these fast growing plants to patio containers and hanging baskets, and tuck into city scape urns. Oxalis sprout quickly, sometimes in just a week, and bloom with a sea of tiny flowers on thread-like stems. Commonly called lucky shamrocks, these upbeat little plants also brighten sunny apartment windowsills. Ideal for small space splashes of green and purple. After discovering oxalis years ago, it's now impossible to imagine being without them.