The Story
Plant Bio
Swainsona formosa is a prostrate, sprawling herbaceous annual or short-lived perennial native to the arid inland regions of mainland Australia. Creeping stems radiate from a central taproot to form a broad, ground-hugging mat of grey-green, glaucous foliage densely covered in fine, silky white hairs.
The species is distinguished by its upright clusters of large, blood-red pea-like flowers, each featuring a prominent, glossy black or deep purple central boss. These flowers are structurally adapted for pollination by native honeyeaters, which probe the central beak-guide for nectar.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Groundcover
Height
30 inches
Width
118 inches
Light
Full Sun
Zones
9, 10
Water
Low
Humidity
Low
Lifespan
Short-lived perennial or annual
Native To
Australia
Toxicity
Non-toxic
Bloom period
Spring – Summer
In flower about 4 months of the year
Planting
How to Grow
- Select a position in full sun with highly porous, free-draining sandy or loamy soil.
- Sow pre-treated seeds directly into the soil or plant tube stock carefully without disturbing the root ball.
- Water from the bottom or apply water directly to the surrounding soil, keeping the stem collar dry.
- Apply a controlled-release fertiliser regularly during the active spring and summer growth phases.
Pro Tip
Sow seeds directly into their final growing position or use deep terracotta pipes filled with a highly porous, sand-based medium to accommodate the sensitive taproot and ensure flawless drainage.
Keep It Thriving
Care Guide
Do
- Use a highly open, free-draining growing medium such as composted pine bark and coarse sand.
- Water from below to keep the foliage and stem base completely dry.
- Sow seeds directly in their permanent garden position to prevent transplant shock.
- Provide full sun and excellent air circulation to discourage fungal diseases.
Don't
- Do not disturb or damage the sensitive taproot during planting.
- Do not use overhead watering or allow water to pool around the base of the plant.
- Do not plant in heavy clay soils or areas subject to high humidity.
- Do not prune hard into old, leafless wood.
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Pest Check | ||||||||||||
| Propagate | ||||||||||||
| Winter Prep |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Sturt's Desert Pea questions
What zones can Sturt's Desert Pea grow in?
Sturt's Desert Pea 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.
When does Sturt's Desert Pea bloom?
Sturt's Desert Pea 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 Sturt's Desert Pea need full sun?
Sturt's Desert Pea does best in full sun (6+ hours).
Is Sturt's Desert Pea drought tolerant?
Yes — once established (usually after the first full season), Sturt's Desert Pea handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
Keep exploring
Explore the genus
Hardy in your zone?
Grow Sturt's Desert Pea with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.