Yucca glauca aka Bear Grass

Yucca glauca is an evergreen shrub in the Asparagaceae family. Common names include soapweed and Great Plains yucca. Its native range runs from southern Alberta to northern Texas. It grows on dry plains, sandy hills, and grasslands. The name glauca refers to its gray-green leaf coating. Its stiff leaves form dense clumps close to the ground.

Garden plants reach about 3–5 feet [1–1.5 metres] tall. They spread about 1.6–3.3 feet [0.5–1 metre] wide. Reports also give heights near 6 feet [2 metres]. Flower stalks rise well above the leaf clump. Long, narrow leaves grow in one or sometimes two rosettes. Each leaf ends in a sharp point. Leaves reach 1–2.5 feet [0.3–0.76 metres] long. Their edges curl inward and carry fine white threads. Narrow stems seldom branch. Dead brown leaves often hide the gray-brown bark.

Flowers appear in summer, with late summer noted by RHS. The large bells hang downward and look cream or greenish white. They grow along tall, upright flower stalks. Yucca moths pollinate the flowers, and their larvae eat developing seeds. The plant also draws butterflies and bees. Its fruit forms a long, woody capsule. Inside lie many flat, shiny black seeds. Small mammals, birds, and reptiles use the plant for shelter. It also supplies food for wildlife.

Grow this yucca in full sun with soil that drains well. It tolerates drought, poor soil, and rocky ground. Wet, waterlogged soil can kill it. Sandy, chalky, and loamy soils suit it. It accepts acid, neutral, and alkaline soil. RHS also allows moist soil when drainage remains good. Growth is moderate, and full size may take five to ten years. Sources place it in USDA zones 4–8, with Oregon State reporting zone 3. RHS gives it a UK hardiness rating of H5. It suits rock gardens, dry slopes, borders, patios, and pots.

Care needs are low, with few major pests or diseases. Pruning is unnecessary, though spent flower stems can be removed. Deer tend to leave it alone. The plant has a high fire risk. Sharp leaf tips and possible skin reactions call for careful handling. Sources list fruit, flowers, buds, stems, and seedpods as edible. This does not make every part safe to eat. Roots contain saponins and can harm people and pets. Dogs and cats may vomit after eating them. Root lather has served as soap and shampoo. Native Americans used leaf fibres for rope and woven goods.