Yucca filamentosa 'Excalibur' is a dramatic, architectural yucca that brings year-round structure to dry gardens and sunny borders. You get a dense rosette of narrow, stiff, thread-edged leaves with a distinctive blue-green cast, plus tall summer flower spikes topped with creamy white, bell-shaped blooms.
Place it where the foliage can be appreciated up close: along walkways, in gravel gardens, or as a bold accent among lower perennials. The plant stays about 24 inches tall in foliage, while the flower stalks rise well above the leaves when in bloom. It looks best in well-drained soil and an open spot that dries quickly after rain.
Give your yucca full sun for the strongest growth and best flowering, but it will also perform in part shade (often with fewer blooms). Once established, it handles drought well and tolerates lean soils and coastal conditions. Avoid consistently wet or poorly drained sites, especially in winter.
Maintenance is simple: remove spent flower stalks after bloom and trim away old outer leaves as needed. With time it may form offsets, creating a larger clump that can be divided if you want more plants or need to limit spread.