The Story
Plant Bio
Ptilotus extenuatus, the slender mulla mulla, is an erect perennial herb native to eastern Australia that develops a woody rootstock and stems up to 12 inches high. Over the growing season, these stems become decumbent, lying close to the ground, with the initial woolly-hairy coating on the stems and foliage shedding to leave them smooth.
This rare species is distinguished by its narrow, interrupted flower spikes up to five inches long, which contain roughly 20 crowded flowers with dry, papery bracts. The small, linear to lance-shaped leaves are spaced widely along the stems, with new growth displaying a distinct woolly texture.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Perennial
Height
12"
Light
Full Sun
Water
Low
Humidity
Low
Lifespan
Perennial
Native To
Eastern Australia
Toxicity
Non-toxic
Bloom period
Summer – Autumn
In flower about 6 months of the year
Planting
How to Grow
- Select a planting site with excellent drainage and full sun exposure.
- Prepare the soil to ensure it is loose and free-draining, avoiding heavy clay.
- Water sparingly during establishment, allowing the soil to dry completely between waterings.
- Avoid applying high-phosphorus fertilizers, opting for low-rate native formulations if necessary.
Pro Tip
Avoid pruning into the old, woody rootstock; cutting back into bare wood will cause permanent dieback of the stems.
Keep It Thriving
Care Guide
Do
- Grow in highly porous, well-drained soil mixtures.
- Provide maximum sunlight to maintain compact, erect growth.
- Protect the root system from waterlogged conditions.
Don't
- Do not overwater or allow the plant to sit in standing water.
- Do not prune heavily into old, leafless wood.
- Do not apply standard high-phosphorus garden fertilizers.
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Pest Check | ||||||||||||
| Prune | ||||||||||||
| Winter Prep |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Multiply
Propagation Methods
Good to Know
Common Questions
Slender Mulla Mulla questions
When does Slender Mulla Mulla bloom?
Slender Mulla Mulla typically blooms in summer through autumn. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Slender Mulla Mulla need full sun?
Slender Mulla Mulla does best in full sun (6+ hours).
Is Slender Mulla Mulla drought tolerant?
Yes — once established (usually after the first full season), Slender Mulla Mulla handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Ptilotus to compare
Keep exploring
Explore the genus
Grow Slender Mulla Mulla 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.