Adams needle yucca with thread-edged green sword leaves and a tall stalk of creamy white flowers

Yucca Filamentosa (Adam’s Needle)

Yucca filamentosa
Categories:
Water
Low water once established. Water deeply, then let soil dry between waterings; provide occasional supplemental irrigation during prolonged summer heat. Reduce watering in winter.
Description
Adam’s needle is a trunkless yucca with stiff, sword-shaped leaves edged in curling white threads. Native to the southeastern United States, it benefits from protection from Phoenix’s harshest summer exposure.
Deciduous / Evergreen
Growth Rate
Growth Habit
Flower Color
Foliage and roots toxic to pets and livestock if ingested (saponins)
Care Instructions

Light: Full sun to light shade; morning sun with afternoon shade is best in Phoenix. Avoid intense reflected heat from west-facing walls.

Water: Low water once established. Water deeply, then let soil dry between waterings; provide occasional supplemental irrigation during prolonged summer heat. Reduce watering in winter.

Soil: Well-drained sandy, gravelly, or loamy soil. Tolerates alkaline soil but struggles in persistently wet or compacted ground.

Mature size: 2–3 feet tall and 3–4 feet wide per rosette; colonies spread wider. Flower stalks typically reach 5–8 feet.

Bloom: Established plants may bloom in late spring to early summer; flowering is not guaranteed every year. Does not die after flowering like an agave.

Evergreen / deciduous: Evergreen.

Growth rate: Slow to moderate.