perennial

Harriman's Yucca

Yucca harrimaniae

The Story

Plant Bio

Yucca harrimaniae is a perennial shrub characterized by its rosette of stiff, sword-shaped leaves and tall flower stalks bearing creamy-white, bell-shaped flowers. It thrives in arid, rocky environments.

This species is notable for its drought tolerance and striking, slender leaves with a bluish-green hue, making it an attractive xeriscape choice.

Uses & Benefits:

Its striking spiky silhouette adds dramatic flair to xeriscapes and modern gardens.

Requires minimal watering and care, ideal for drought-prone areas.

Provides habitat for certain desert-adapted insects and birds.

Essentials

At a Glance

Plant Type

Perennial

Height

36 inches

Width

24 inches

Light

Full Sun

Zones

5, 6, 7, 8, 9, 10

Water

Low

Humidity

Low

Lifespan

Many years with proper care

Native To

North America (desert regions)

Toxicity

Mildly toxic to humans, toxic to pets if ingested

Bloom period

Mid-summer – Late summer

In flower about 2 months of the year

Planting

How to Grow

Tuck seeds or small plants into well-draining soil.
Water sparingly until established, about 6 weeks.
Position in full sun for optimal growth.
Apply a cactus or succulent fertilizer during growing season.
Mulch lightly to retain moisture and suppress weeds.
Protect from frost if in colder zones during winter.

Pro Tip

Ensure excellent drainage to prevent root rot; avoid overwatering.

Keep It Thriving

Care Guide

Do

Water sparingly during drought periods 🌱
Apply well-draining soil to prevent waterlogging
Remove dead or damaged leaves to maintain appearance
Use cactus fertilizer in spring and summer

Don't

Avoid overwatering, especially in winter ❌
Don't plant in heavy clay soil without amendment
Never expose to prolonged wet conditions
Refrain from fertilizing in late fall or winter

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mulch
Plant
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Sculptural focal pointArid desert borderVertical accent in xeriscape

Companion Plants

Agave Sedum Echinocactus Aloe Yucca filamentosa

Multiply

Propagation Methods

Good to Know

Common Questions

Harriman's Yucca questions

What zones can Harriman's Yucca grow in?

Harriman's Yucca is hardy in USDA Zones 5–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Harriman's Yucca deer resistant?

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

When does Harriman's Yucca bloom?

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

Does Harriman's Yucca need full sun?

Harriman's Yucca does best in full sun (6+ hours).

Is Harriman's Yucca drought tolerant?

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