6 named cultivars

perennialN. America Native

Weak-leaf Yucca

Yucca flaccida

The Story

Plant Bio

Yucca flaccida is an evergreen perennial of eastern North America that makes a low rosette of sword-shaped leaves about 1 to 1.7 ft long, edged with curling white threads. The outer leaves bend back on themselves, giving a softer and floppier outline than most yuccas. A tall panicle of nodding white bell flowers rises well clear of the foliage in summer.

The flower stalk reaches 3 to 8 ft, far above the leaf rosette, so allow headroom when siting it. Flowers are pollinated at night by yucca moths whose caterpillars then feed on part of the developing seed, a partnership that exists nowhere outside this genus. NCSU lists the plant as poisonous.

Uses & Benefits:

Evergreen sword-shaped foliage with curling white threads gives year-round structure, topped by a tall spike of white bells in summer.

Survives drought, poor soil and neglect, and the fibrous leaves have long been used for cordage; NCSU notes the roots are harvested for saponins.

Supports the yucca moths that alone can pollinate it, and the flowers draw bees, butterflies and moths through midsummer nights.

Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

36 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9, 10

Water

Low; drought tolerant

Humidity

Tolerates dry air

Lifespan

Long-lived; clumps persist for decades

Native To

Eastern North America

Toxicity

Toxic — listed as poisonous; roots contain saponins

Planting

How to Grow

Plant in full sun in sharply drained sandy or rocky soil.
Set the crown at or slightly above the surrounding grade.
Leave a foot of clear ground around the rosette for offsets.
Water only until the plant is rooted, then leave it dry.
Cut the spent flower stalk to the base once seed has set.
Pull away dead outer leaves by hand each spring.

Pro Tip

Plant it away from paths and seating: the leaf tips are stiff enough to catch bare legs even on this soft-leaved species.

Keep It Thriving

Care Guide

Do

Give it the driest, sunniest spot you have 🌞
Improve heavy soil with grit before planting 🪨
Remove the flower spike once it browns ✂️
Divide offsets in spring to make new plants 🌱

Don't

Do not plant it in wet or shaded ground ❌
Do not let pets or children chew the leaves or roots ❌
Do not mulch over the crown; it will rot ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cut Down The Flower Stalk
Tidy The Rosette

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Architectural accent in gravel and dry gardensEvergreen structure in a hot sunny borderContainer or patio specimen in poor free-draining compost

Companion Plants

Prickly pear Butterfly weed Little bluestem Lavender Blue fescue

Multiply

Propagation Methods

Good to Know

Common Questions

Weak-leaf Yucca questions

What zones can Weak-leaf Yucca grow in?

Weak-leaf Yucca is hardy in USDA Zones 4–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Weak-leaf Yucca deer resistant?

Yes — Weak-leaf Yucca is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Weak-leaf Yucca bloom?

Weak-leaf Yucca typically blooms in summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Weak-leaf Yucca need full sun?

Weak-leaf Yucca does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Weak-leaf Yucca drought tolerant?

Yes — once established (usually after the first full season), Weak-leaf Yucca handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.