perennial

Regal-foxtail

The Story

Plant Bio

Ptilotus nobilis is an erect, deeply taprooted herb native to the arid interior of Australia, forming a neat clump of branching stems with thick, semi-succulent foliage. The species is highly adapted to low-fertility soils and extreme drought, requiring exceptional drainage to survive outside its native desert habitat.

Unlike its popular pink-flowered relative Ptilotus exaltatus, this species produces dense, cylindrical spikes of yellowish-green to creamy-green flowers with heavily feathered, sweet-scented perianths. The upright flower heads stretch up to eight inches long on robust specimens, drying to an attractive silvery-green.

Uses & Benefits:

Distinctive chartreuse flower spikes provide architectural interest in dry borders and containers.

Highly drought-tolerant choice for water-restricted landscapes and xeriscapes.

Attracts generalist insect pollinators to the garden during the heat of summer.

Essentials

At a Glance

Plant Type

Perennial

Height

40"

Width

20"

Light

Full Sun

Zones

9, 10

Water

Low

Humidity

Low

Lifespan

Short-lived perennial (grown as annual)

Native To

Australia

Toxicity

Non-toxic

Bloom period

Summer – Fall

In flower about 6 months of the year

Planting

How to Grow

Select a planting site in full sun with exceptionally sharp-draining sandy loam or gravelly soil.
Sow seeds shallowly in warm soil after all danger of frost has passed, or transplant plugs carefully to avoid disturbing the sensitive taproot.
Water sparingly during establishment, then withhold regular watering once the root system is deep.
Avoid applying heavy fertilizers, particularly those high in phosphorus, to prevent soft, weak stems.

Pro Tip

Avoid planting in heavy clay or standard moisture-retentive potting soils; excess moisture at the root collar triggers rapid, fatal fungal rot.

Keep It Thriving

Care Guide

Do

Provide full, unobstructed sunlight for at least six hours daily.
Use highly porous, sand- or grit-heavy potting mixes for container specimens.
Deadhead spent flower spikes to maintain a tidy appearance.

Don't

Do not overwater or allow the soil to remain saturated.
Do not prune hard into the old, leafless woody stems at the base.
Do not apply heavy doses of standard garden fertilizer.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Fertilize
Pest Check
Plant

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Rock gardensContainer specimensXeriscapingGravel gardens

Companion Plants

Eschscholzia californica Festuca glauca Sedum album

Multiply

Propagation Methods

Good to Know

Common Questions

Regal-foxtail questions

What zones can Regal-foxtail grow in?

Regal-foxtail is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Regal-foxtail deer resistant?

Not reliably. Deer may browse Regal-foxtail, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Regal-foxtail bloom?

Regal-foxtail typically blooms in summer through fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Regal-foxtail need full sun?

Regal-foxtail does best in full sun (6+ hours).

Is Regal-foxtail drought tolerant?

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