Adams Needle Yucca Plant Care

Adams Needle Yucca (Yucca filamentosa) belongs to the Asparagaceae family within the Yucca genus. Adams Needle Yucca is native to the southeastern United States. Adams Needle Yucca is also known as Adam's Needle, Common Yucca, Threadleaf Yucca.

Adams Needle Yucca displays an upright, architectural growth habit, reaching up to 6 ft tall with a spread of approximately 3 ft. Adams Needle Yucca produces creamy-white, bell-shaped flowers on tall spikes.

Leaf size: approximately 18 inches.

Water a young or newly planted Adams Needle Yucca every 14–21 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Adams Needle Yucca thrives in full sun to partial shade.

Yucca filamentosa tolerates temperatures of 50–85°F. Adams Needle Yucca prefers humidity levels of 30–60%.

Sandy, well-draining soil mix with added perlite and gravel for good drainage. Good drainage is essential for Adams Needle Yucca to prevent waterlogging, which leads to root rot and fungal issues.

Feed Adams Needle Yucca every 8 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Choose a spot with full sun to partial shade and sandy, well-draining soil mix with added perlite and gravel for good drainage. Avoid low spots where water collects after rain.

Adams Needle Yucca is suited to USDA Zone 4a – 10b.

Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.

Adams Needle Yucca can spread to about 3 ft (0.9 m) and reach about 6 ft (2 m) tall. Space plants about 3 ft (0.9 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the tree spacing calculator.

Prune Adams Needle Yucca while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the tree in one year.

Adams Needle Yucca is hardy down to USDA zone 4a, so once established it can stay outdoors through winter in that zone and warmer ones.

Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.

Young and container-grown trees need extra protection: roots in a pot freeze much more easily than roots in the ground.

Adams Needle Yucca can be propagated through offsets (pups), seeds. Similar propagation techniques also apply to joshua tree plant care, which shares the same genus.

See all plants toxic to cats and plants toxic to dogs.

Adams Needle Yucca is susceptible to aphids, spider mites, scale insects. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Adams Needle Yucca grows outdoors in USDA Zone 4a – 10b. It survives winters down to planting zone 4a. Adams Needle Yucca is native to the southeastern United States.