What good is a cake without the frosting? Sure, it still tastes good, but it isn’t giving you its full potential. That’s sort of what a garden is like without nooks and crannies plants: Good, but not as great as it could be. These tiny treasures fill in all the gaps and cracks of a landscape. They’re great for planting between stepping stones or along the edges of walls. Often they’re considered alpine plants, thriving in rocky soils and less than hospitable conditions—but not always. Steve and Danielle do their best at giving options for nooks and crannies plants for sun, shade, and for various different soil types in this episode. Much to Steve’s disappointment, there was no baked goods sampling during taping.    Expert testimony: Rebecca Sweet, owner of Harmony in the Garden, a landscape design  company in the Bay Area of California.