The Story
Plant Bio
Maireana sedifolia, commonly known as pearl bluebush, is a compact, heavily branched perennial shrub endemic to the arid and semi-arid regions of inland Australia. The species forms a rounded, hemispherical mound of woody stems clad in succulent, egg-shaped leaves that are densely covered in silvery-white woolly hairs.
This species is distinguished by its glaucous foliage that retains its intense metallic-white colour throughout the year, even under extreme heat. In spring, it produces inconspicuous, woolly-hairy flowers that mature into distinctive papery, straw-coloured or pinkish horizontal wings.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Shrub
Height
60 inches
Width
79 inches
Light
Full Sun, Partial Sun
Zones
8, 9, 10
Water
Low
Humidity
Low
Lifespan
Perennial
Native To
Australia
Toxicity
Non-toxic
Bloom period
Spring
In flower about 1 month of the year
Planting
How to Grow
- Select a planting site in full sun with highly well-drained, neutral to alkaline soil, preferably calcareous or limestone-based.
- Dig a hole twice the width of the root ball but of equal depth, ensuring the plant sits slightly proud of the surrounding soil level to prevent water pooling.
- Backfill with the native soil without adding organic matter or compost, which can retain too much moisture around the roots.
- Water in sparingly to settle the soil, then withhold regular irrigation, allowing the plant to rely on natural rainfall once established.
- Apply a mineral mulch, such as gravel or crushed limestone, keeping it clear of the main stem to avoid collar rot.
Pro Tip
Plant in lean, highly alkaline, limestone-based soil with absolute dryness around the root crown; organic mulch and wet summer soils will cause fatal fungal collar rot.
Keep It Thriving
Care Guide
Do
- Grow in full sun to maintain the dense, silvery-white foliage habit.
- Ensure the soil is highly well-drained and alkaline or neutral.
- Keep the area immediately surrounding the root crown completely dry.
Don't
- Do not apply organic mulches like woodchips or compost against the stem.
- Do not overwater or plant in heavy, waterlogged, or acidic soils.
- Do not prune heavily into old, leafless, woody stems as they fail to shoot back.
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pest Check | ||||||||||||
| Plant | ||||||||||||
| Propagate | ||||||||||||
| Prune |
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
Pearl Bluebush, Hoary Bluebush, Dense Bluebush, Pearl Saltbush, Cotton Bush questions
What zones can Pearl Bluebush, Hoary Bluebush, Dense Bluebush, Pearl Saltbush, Cotton Bush grow in?
Pearl Bluebush, Hoary Bluebush, Dense Bluebush, Pearl Saltbush, Cotton Bush 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 Pearl Bluebush, Hoary Bluebush, Dense Bluebush, Pearl Saltbush, Cotton Bush bloom?
Pearl Bluebush, Hoary Bluebush, Dense Bluebush, Pearl Saltbush, Cotton Bush typically blooms in spring through spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Pearl Bluebush, Hoary Bluebush, Dense Bluebush, Pearl Saltbush, Cotton Bush need full sun?
Pearl Bluebush, Hoary Bluebush, Dense Bluebush, Pearl Saltbush, Cotton Bush does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Pearl Bluebush, Hoary Bluebush, Dense Bluebush, Pearl Saltbush, Cotton Bush drought tolerant?
Yes — once established (usually after the first full season), Pearl Bluebush, Hoary Bluebush, Dense Bluebush, Pearl Saltbush, Cotton Bush 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 Pearl Bluebush, Hoary Bluebush, Dense Bluebush, Pearl Saltbush, Cotton Bush 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.