Sydney Blue Gum
Scientific name: Eucalyptus saligna
Overview
Sydney Blue Gum is a dense Australian eucalyptus species valued for structural strength, durability, and attractive warm coloration. Native to eastern Australia, it is commonly used in heavy construction, flooring, and exterior applications.
It is darker and richer in tone than Mountain Ash or Blackbutt, but generally less extreme in density than Ironbark or Buloke. Within the Oceania cluster, it represents a balanced structural hardwood with moderate decorative character.
Quick Facts
- Common Name: Sydney Blue Gum
- Scientific Name: Eucalyptus saligna
- Region: Oceania & Pacific Hardwoods (Australia – eastern regions)
- Tree Size: 100–180 ft tall, 3–6 ft trunk diameter
- Average Dried Weight: 50 lbs/ft³ (800 kg/m³)
- Janka Hardness: 1,200 lbf
- Color: Pale pink to reddish brown, often darkening with age
- Grain: Straight to interlocked
- Texture: Medium
Identification Characteristics
Sydney Blue Gum is identified by its warm pink to reddish-brown coloration and moderately coarse texture. The grain is typically straight but may show slight interlocking. The wood darkens slightly with age.
Compared to Jarrah, it is generally lighter and less deeply red. Compared to Blackbutt, it is darker and more visually active.
Key identification traits include:
- Pink to red-brown tone
- Medium to coarse texture
- Straight to slightly interlocked grain
- Heavy weight
- Structural appearance with subtle figure
Working Properties
Sydney Blue Gum machines well for a dense eucalyptus species.
- Moderate tool wear
- Carbide tooling recommended
- Sands to a smooth finish
- Accepts oil and clear finishes well
Proper drying reduces movement and improves stability.
Safety Note
Wood dust may cause irritation in sensitive individuals. Use respiratory protection during machining.
Common Uses
Sydney Blue Gum common uses including:
- Structural beams
- Flooring
- Decking
- Exterior cladding
- Furniture
- Joinery
Sustainability & Notes
Sydney Blue Gum is commercially harvested under Australian forestry regulations. It remains an important structural and construction hardwood in eastern Australia.
It occupies the mid-to-high density structural category within the Oceania hardwood cluster.
Comparative Notes & Related Species
Spotted Gum – A strong Australian hardwood widely used in flooring and structural applications, typically more stable and slightly lighter in color.
Tallowwood – A durable hardwood valued for its resistance to moisture and use in decking and exterior construction.
Red Ironbark – A very dense hardwood known for its strength and durability, generally heavier and harder than Sydney Blue Gum.
Related Guides
Density & Hardness Explained (Janka Scale Guide)
Sydney Blue Gum ranks in the high-density structural range.
Moisture Content & Long-Term Stability
Proper acclimation is important in flooring and construction applications.
How to Identify Hardwood by Grain Pattern
Understanding eucalyptus grain variation assists in field identification.
Compare Wood Properties
See how this species ranks in density and hardness using our Wood Density & Janka Hardness Chart. You can also explore Hardest Woods, Softest Woods, and Most Dense Woods for quick comparisons.
Collector Notes
Sydney Blue Gum provides strong mid-range density representation within a documented Australian hardwood collection. Its warm coloration contrasts well against lighter species such as Mountain Ash and Blackbutt. Flat-sawn samples best display its grain character. Thin labeled blocks are recommended due to its density.
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Wood Sample Collection
This species is part of an ongoing effort to document and preserve wood samples from around the world.
Learn more about contributing to the collection:
Resources
Authoritative botanical and forestry references used in compiling information about this species include:
• USDA Forest Service – Wood Handbook: Wood as an Engineering Material
https://www.fpl.fs.usda.gov/products/publications/
• The Wood Database – Global reference for wood identification, physical properties, and woodworking characteristics
https://www.wood-database.com/
• Royal Botanic Gardens, Kew – Plants of the World Online – Botanical taxonomy and species distribution database
https://powo.science.kew.org/
• International Union for Conservation of Nature (IUCN Red List) – Global conservation status assessments
https://www.iucnredlist.org/
• Convention on International Trade in Endangered Species (CITES) – International trade regulations for protected plant species
https://cites.org/
Additional forestry publications, academic research papers, and regional timber studies may also be referenced where available.
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Availability & Where to Buy
Exotic hardwood availability can vary significantly depending on region, sustainability regulations, and supplier inventory.
As this archive grows, recommended suppliers and specialty wood retailers will be listed here to help woodworkers locate responsibly sourced material.
Lumber Suppliers:
Availability varies — see the Where to Buy Exotic Woods page for current sources.
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