perennial

Hispid Fireweed

Senecio hispidulus

The Story

Plant Bio

Senecio hispidulus is an erect, short-lived perennial or annual herb native to Australia, characterized by its rough, dark green to yellow-green foliage and ribbed stems. In spring and summer, the plant produces dense clusters of small, cylindrical yellow flower heads at the branch tips.

The upper leaf surfaces are covered in short, stiff hairs that feel rough to the touch, while the undersides bear longer, softer hairs. Exposure to cooler temperatures often causes the upper stems and foliage to develop distinct red or purple coloration.

Uses & Benefits:

Provides a wild, naturalistic texture with its deeply lobed, rough foliage and pale yellow flower heads.

Useful for low-maintenance, dry-land reclamation projects where minimal soil preparation is possible.

Serves as an early colonizer of disturbed soils, helping to stabilize ground and providing nectar for native insect pollinators.

Essentials

At a Glance

Plant Type

Perennial

Height

40"

Width

18"

Light

Full Sun, Partial Sun

Zones

8, 9, 10

Water

Low

Humidity

Low

Lifespan

Short-lived perennial

Native To

Australia

Toxicity

Toxic if ingested; skin irritant

Bloom period

Spring – Summer

In flower about 6 months of the year

Planting

How to Grow

Sow seeds on the surface of a well-draining, sandy seed-starting mix, as they require light to germinate.
Maintain light moisture without waterlogging, keeping the tray in a warm, bright position.
Transplant seedlings into individual pots once they are large enough to handle, using a sandy, low-nutrient potting medium.
Plant out into a full sun or partially shaded garden bed with excellent drainage and minimal organic matter.

Pro Tip

Avoid planting in heavy clay or poorly drained soils, as wet winter conditions will rot the root system of this dry-land colonizer.

Keep It Thriving

Care Guide

Do

Provide a highly free-draining sandy or gravelly soil to prevent root rot.
Wear gloves when handling the plant to avoid skin irritation from the stiff, coarse hairs.

Don't

Do not apply heavy fertilizers, particularly phosphorus-rich formulas, which can disrupt natural growth.
Avoid overwatering once established, as the plant is adapted to dry, rocky, and disturbed environments.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Pest Check
Plant
Propagate
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

RevegetationRock gardensWildflower meadows

Companion Plants

Xerochrysum bracteatum Themeda triandra Poa sieberiana

Multiply

Propagation Methods

Good to Know

Common Questions

Hispid Fireweed questions

What zones can Hispid Fireweed grow in?

Hispid Fireweed is hardy in USDA Zones 8–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Hispid Fireweed bloom?

Hispid Fireweed typically blooms in spring through summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Hispid Fireweed need full sun?

Hispid Fireweed does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Hispid Fireweed drought tolerant?

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