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Adam's needle

Yucca filamentosa

Last reviewed: August 2026

Yucca filamentosa is an evergreen rosette-forming succulent that sends up tall flower spikes of creamy white blooms from June through August. It thrives in full sun with low water once established, making it a reliable choice for dry, sandy garden beds.

Adam's needle (Yucca filamentosa)
Photo: Kurt Stüber [1] / Wikimedia Commons (CC BY-SA 3.0)

Toxicity unknown

Adam's needle (Yucca filamentosa) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

full sun

Water

low

Size

24"–96" H × 36"–48" W

Bloom

Jun, Jul, Aug

Native to

AL, FL, GA, LA and 7 more states

Pollinators

moths, bees

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A trunkless, clump-forming succulent with stiff, sword-shaped evergreen leaves edged in curling white filaments and a tall branched spike of large creamy-white bell-shaped flowers in summer. Adaptable to a wide range of soils.

Growing Adam's needle

Grow Adam's needle in full sun and low water. Mature plants reach 24 to 96 inches tall and spread 36 to 48 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

Regional care guide

How to care for Adam's needle where it is actually grown: year-round basics plus what to do each season, region by region, with the sources for each.

Care guidance last updated: July 2026

Enter your ZIP code and we will open the guidance for your region.

Cross Timbers (includes Fort Worth, TX)

Year-round

Adam's needle is a tough, low-water rosette plant that stays evergreen year round and needs very little from you once it's settled in.

  • Plant in full sun, at least 6 hours of direct light a day, for the tightest, most compact rosette shape
  • Water deeply about once a week for the first growing season, then let rainfall carry it; established plants only need supplemental water in extended summer drought
  • In heavy black clay, set the crown a couple of inches above grade on a slight mound or amend the planting hole for drainage; in the sandier soils west of the metro it drains faster on its own but will need water more often through its first summer
  • Give it 3 to 4 feet of open space on all sides since the leaf tips are sharp and stiff, avoid planting it right next to a walkway, driveway, or anywhere kids or pets pass close by
  • Skip fertilizer in most yards, it flowers and holds its shape better in lean soil

A single Adam's needle planted with breathing room reads as a deliberate structural accent, not overgrowth, which is an easy case to make if a board ever asks about it.

Summer

Summer brings the full bloom show on tall flower stalks, and this plant handles North Texas heat and dry spells with almost no help from you.

  • Established plants (in the ground over a year) need no supplemental water even through 100F-plus weeks, only water new plantings if leaves start to curl or droop
  • White, bell-shaped flowers open on the stalk through June, July, and August, usually opening in the evening
  • Cut the spent flower stalk down to the base once blooming finishes and it starts to brown, to keep the clump tidy
  • Watch for the small white yucca moth visiting flowers at dusk, it is the plant's only pollinator and its caterpillars develop inside the seed pods without harming the plant

Cutting the flower stalk back promptly once it browns keeps the plant looking maintained through the hottest, most visible part of the growing season.

Fall

Fall is a quiet season for Adam's needle, mostly light tidying as growth slows and North Texas cools off.

  • Trim any brown or damaged leaves at their base, but leave healthy green leaves in place through winter for cold protection
  • Skip fertilizing or heavy pruning this time of year, the plant is shifting into dormancy
  • If you're adding a new plant, fall (September through November) works nearly as well as spring for these low-water succulents, since roots have mild weather to establish before summer
  • Rake fallen leaves or debris out from the base of the clump so the crown stays dry

Winter

Adam's needle stays green and holds its shape through North Texas winters, needing almost nothing from you except protection from foot traffic near its sharp leaf tips.

  • Leave the plant alone through short cold snaps, it tolerates USDA zone 8a to 8b winters without covering
  • During a severe Arctic outbreak with hard, multi-day freezes, a light frost cloth over the crown is optional extra insurance, most established plants do not need it
  • Do not water on a schedule in winter, only if the soil has been bone dry for several weeks with no rain
  • Hold off on any pruning until you see new spring growth, so you can tell live tissue from winter damage

The evergreen rosette shape stays visually neat all winter with no work from you, useful if a neighbor or board member is scanning bare-looking yards this time of year.

Spring

Spring is the best time to plant Adam's needle in North Texas, and it's when older clumps send up their tall flower stalk.

  • Plant new nursery starts any time from March through May once the last frost has passed (mid March in North Texas)
  • Water a new planting twice a week for the first 3 to 4 weeks to help roots establish before summer heat arrives
  • Watch for a thick flower stalk rising from the center of mature clumps starting in late spring, it can reach several feet tall
  • Remove any winter-damaged or browned leaf tips at the base with clean shears before new growth picks up

A fresh spring flower stalk rising above the leaf clump is the plant's showiest, most obviously intentional moment, a good time to point it out if curb appeal ever comes up.

Sources: Lady Bird Johnson Wildflower Center: Yucca filamentosa, ASPCA: Yucca toxicity, Xerces Society: Yucca moth and yucca pollination

Texas Blackland Prairies (includes Dallas, TX)

Year-round

Adam's needle is a tough, low-water rosette plant that stays evergreen year round and needs very little from you once it's settled in.

  • Plant in full sun, at least 6 hours of direct light a day, for the tightest, most compact rosette shape
  • Water deeply about once a week for the first growing season, then let rainfall carry it; established plants only need supplemental water in extended summer drought
  • In heavy black clay, set the crown a couple of inches above grade on a slight mound or amend the planting hole for drainage; in the sandier soils west of the metro it drains faster on its own but will need water more often through its first summer
  • Give it 3 to 4 feet of open space on all sides since the leaf tips are sharp and stiff, avoid planting it right next to a walkway, driveway, or anywhere kids or pets pass close by
  • Skip fertilizer in most yards, it flowers and holds its shape better in lean soil

A single Adam's needle planted with breathing room reads as a deliberate structural accent, not overgrowth, which is an easy case to make if a board ever asks about it.

Summer

Summer brings the full bloom show on tall flower stalks, and this plant handles North Texas heat and dry spells with almost no help from you.

  • Established plants (in the ground over a year) need no supplemental water even through 100F-plus weeks, only water new plantings if leaves start to curl or droop
  • White, bell-shaped flowers open on the stalk through June, July, and August, usually opening in the evening
  • Cut the spent flower stalk down to the base once blooming finishes and it starts to brown, to keep the clump tidy
  • Watch for the small white yucca moth visiting flowers at dusk, it is the plant's only pollinator and its caterpillars develop inside the seed pods without harming the plant

Cutting the flower stalk back promptly once it browns keeps the plant looking maintained through the hottest, most visible part of the growing season.

Fall

Fall is a quiet season for Adam's needle, mostly light tidying as growth slows and North Texas cools off.

  • Trim any brown or damaged leaves at their base, but leave healthy green leaves in place through winter for cold protection
  • Skip fertilizing or heavy pruning this time of year, the plant is shifting into dormancy
  • If you're adding a new plant, fall (September through November) works nearly as well as spring for these low-water succulents, since roots have mild weather to establish before summer
  • Rake fallen leaves or debris out from the base of the clump so the crown stays dry

Winter

Adam's needle stays green and holds its shape through North Texas winters, needing almost nothing from you except protection from foot traffic near its sharp leaf tips.

  • Leave the plant alone through short cold snaps, it tolerates USDA zone 8a to 8b winters without covering
  • During a severe Arctic outbreak with hard, multi-day freezes, a light frost cloth over the crown is optional extra insurance, most established plants do not need it
  • Do not water on a schedule in winter, only if the soil has been bone dry for several weeks with no rain
  • Hold off on any pruning until you see new spring growth, so you can tell live tissue from winter damage

The evergreen rosette shape stays visually neat all winter with no work from you, useful if a neighbor or board member is scanning bare-looking yards this time of year.

Spring

Spring is the best time to plant Adam's needle in North Texas, and it's when older clumps send up their tall flower stalk.

  • Plant new nursery starts any time from March through May once the last frost has passed (mid March in North Texas)
  • Water a new planting twice a week for the first 3 to 4 weeks to help roots establish before summer heat arrives
  • Watch for a thick flower stalk rising from the center of mature clumps starting in late spring, it can reach several feet tall
  • Remove any winter-damaged or browned leaf tips at the base with clean shears before new growth picks up

A fresh spring flower stalk rising above the leaf clump is the plant's showiest, most obviously intentional moment, a good time to point it out if curb appeal ever comes up.

Sources: Lady Bird Johnson Wildflower Center: Yucca filamentosa, ASPCA: Yucca toxicity, Xerces Society: Yucca moth and yucca pollination

Want these tasks as reminders timed to your yard? Pollinator Patch turns this guidance into a season-by-season care plan for the plants you actually grow.

In an HOA neighborhood

Adam's needle is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.

Works well in: front yard, foundation, street edge.

  • Leaf tips are sharp; plant away from walkways and foot traffic

Wildlife value

Host plant for yucca moth.

Tall summer flower spikes are pollinated by yucca moths and also provide nectar for bees.

Common questions

When does Yucca filamentosa bloom?
Yucca filamentosa typically flowers from June through August, producing a tall spike of bell-shaped, creamy white blossoms above the evergreen leaf rosette.
What pollinates Yucca filamentosa?
Yucca filamentosa depends on yucca moths for pollination, a specialized relationship in which the moth lays eggs inside the flower while pollinating it. Bees also visit the blooms for nectar and pollen.
How much water does Yucca filamentosa need?
This plant prefers low water once established and handles dry spells well. It grows best in well-drained soil and should not be kept consistently wet.
How much sun does Yucca filamentosa need?
Yucca filamentosa grows best in full sun but can tolerate some part sun conditions, especially in hotter climates where a bit of afternoon shade can help.
What kind of climate suits Yucca filamentosa?
It does well in warm, humid summers and mild winters typical of the southeastern coastal plain and Piedmont regions, tolerating sandy, well-drained soils and periods of drought.
Is Adam's needle HOA-friendly?
Adam's needle is generally an HOA-friendly choice in the right placement, with low maintenance.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

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