Plants reaching 6 to 12 inches tall occupy the critical transition zone between groundcovers and taller perennials, creating textural interest and filling gaps in layered plantings. In nature, these species thrive in partially shaded woodland edges and prairie understories where their moderate height allows them to capture filtered light while remaining protected by taller neighbors. In the garden, use ankle-high plants like spring flowers, sedges and short prairie grasses as edging plants, woodland groundcovers, and front-of-border specimens that add depth without blocking views of taller plants behind them.