The illustrated growing guide

Adam's Needle (Hardy Yucca)

Yucca filamentosa

Family Asparagaceae

Est. zones 4-10

Botanical illustration of Adam's Needle (Hardy Yucca) — Shrub · Yucca filamentosa

Not a desert exclusive — this yucca is native from the Gulf to New England and hardy to zone 4, an evergreen architectural rosette that throws a spectacular 6-foot flower spike in summer. Nearly indestructible in poor, dry, sandy soil; only wet clay kills it. Fun fact: it can only be pollinated by one specific moth.

Shrub · Native

Where to buy the plant — 1 nursery

Yucca Pod — a print from the Seed Heads & Pods collection

From the print shop

Growing adam's needle (hardy yucca)? Hang it.

Our Seed Heads & Pods collection carries adam's needle (hardy yucca) — Yucca filamentosa, print Nº 2, “Yucca Pod.”

16 designsfrom $21.99white or black groundmatte poster, unframed

Shop Seed Heads & Pods botanical prints →

Overview

Will adam's needle (hardy yucca) suit your garden, and what goes wrong.

✓

Will it thrive where you are?

Enter your ZIP — we look up your USDA hardiness zone (2023 map) and check it against what adam's needle (hardy yucca) actually needs.

Hardy inZones 4-10

Adam's Needle (Hardy Yucca) at a glance

HardinessUSDA 4–10

Mature sizeRosette 2-3 ft; flower spike 5-8 ft

PollinationPollinated ONLY by the yucca moth (an obligate partnership); flowers edible

Chill requirementNot yet established

Bloom seasonSummer — a dramatic 6-ft spike of creamy bells

Harvest seasonNot yet established

Growth rateSlow

Common adam's needle (hardy yucca) problems

Almost none
Root Rot in wet clay

Growing

Light, water, soil, propagation and the season’s jobs.

How to grow adam's needle (hardy yucca): light, water & soil

LightFull Sun

WaterVery low — drought- and salt-proof

SoilSandy, sharp drainage; hates wet clay · pH 6.0 - 7.5

FertilizerNone

PruningSpring — Cut the spent flower spike; remove dead outer leaves. It offsets into clumps.

Spacing2-3 ft

How to plant & propagate adam's needle (hardy yucca)

PropagateSeed (stratify), cuttings, or layering

When to spray adam's needle (hardy yucca)

Growing season. Drainage is everything.

Timing only — the label is the law

This is when to watch and when a treatment is worth considering, not a recommendation to apply any product. Read and follow the product label before you spray — under federal law the label is the legal instruction, and using a pesticide against it is illegal.

Check the pre-harvest interval. Every product that’s cleared for an edible crop sets a minimum number of days between spraying and picking. Find it on the label before you spray anything you intend to eat.
Check the re-entry interval before you or anyone else works in the treated area again, and use the protective equipment the label names.
Confirm the product is registered for adam's needle (hardy yucca) in your state. A product legal on one crop is not legal on all of them, and state registrations differ — your state pesticide agency or local extension office can confirm both.
Rates and mixing instructions come from the label, never from us. We don’t publish them because they differ by product and formulation.

III

The year

What adam's needle (hardy yucca) asks for, month by month.

The adam's needle (hardy yucca) year, month by month

MonthJanFebMarAprMayJunJulAugSepOctNovDec

Bloom

Prune

What each band means

Bloom — flowers open — pollinators working, frost on blossoms is the danger.
Prune — shape it now — cuts heal cleanly and structure is visible.

The adam's needle (hardy yucca) year as text

Jan quiet month
Feb quiet month
Mar pruning
Apr pruning
May pruning
Jun bloom
Jul bloom
Aug bloom
Sep quiet month
Oct quiet month
Nov quiet month
Dec quiet month

These are the species' typical months — expect them a few weeks earlier in warm zones and later in cold ones. Watch the plant, not just the calendar.

Ecology & uses

What it does for the garden, and what it is grown for.

Adam's Needle (Hardy Yucca) in the garden system

Shrub layer shrub

AttractsBirds, Hummingbirds

HabitatDry/rocky

MoistureUpland / dry

DeerBrowsed — protect young plants

OriginNative to North America

What adam's needle (hardy yucca) is grown for

✓ Not known to be toxicEdible flowers; sharp leaf tips — site away from paths

UseArchitectural accent

UseXeriscape

UseNative evergreen

Edibility, identification, and traditional-use notes here are general reference — not medical or veterinary advice, and not a claim that any plant treats or prevents anything. Medicinal ratings record how strongly a plant features in herbal tradition, nothing more. Never eat or dose a plant you have not positively identified. More on how to use this library.

Cultivars

Named varieties of adam's needle (hardy yucca), ruled as a catalogue.

Best adam's needle (hardy yucca) varieties & cultivars

'Color Guard' (gold-striped), 'Bright Edge', 'Ivory Tower'; native species is bulletproof

Sources & plant ID

Where the care distinctions come from, and how the plant is filed.

Research basis

Sources behind this profile

No extension citations are attached to adam's needle (hardy yucca)yet. The care figures below come from the library's own catalogue rather than a traced primary source.

Plant ID

BinomialYucca filamentosa

FamilyAsparagaceae

TypeShrub · Perennial

USDA symbolYUFI

OriginNative to North America

Invasive riskLow

VII

Where to buy

Third-party nurseries — not Story Thyme Farms.

Third-party nurseries, not Story Thyme Farms. Prices are theirs.

Story Thyme Farms may earn a small commission from these links, at no cost to you — it never changes what we recommend.

EtsyBrowse growers↗

VIII

Questions

Adam's Needle (Hardy Yucca) questions, answered straight.

Is adam's needle (hardy yucca) safe for kids and pets?

Adam's Needle (Hardy Yucca) is commonly eaten and isn't considered toxic, but "commonly eaten" isn't a guarantee for any particular person or animal — allergies, quantity, and which part you eat all matter. One caveat on this one: Edible flowers; sharp leaf tips — site away from paths. Never eat a plant you haven't positively identified, and check with a vet before letting pets or livestock graze anything new.

How do you propagate adam's needle (hardy yucca)?

Seed (stratify), cuttings, or layering.

Elsewhere

Where adam's needle (hardy yucca) sits in the library.

Where adam's needle (hardy yucca) sits in the library

Native plants135 All collections

Grows in the same world

Rose

Hydrangea

Common Lilac Botanical illustration of Forsythia

Forsythia