Trillion Trees Australia
Hazelmere, Western Australia, Australia 路 Nonprofit 路 Regional 路 since 1979
Perth's community tree planters since 1979, formerly Men of the Trees WA, with over 15 million natives in the ground
About
Trillion Trees Australia is a Western Australian not-for-profit founded in 1979 as Men of the Trees WA, part of the movement started by Richard St Barbe Baker in 1922, and renamed in 2019. From its Hazelmere base it runs a community native plant nursery (established 1987, producing 150,000-200,000 plants a year), landscape restoration projects along the Helena and Swan rivers, in the Wheatbelt and in Chittering, free community planting days, and the SPROUT! schools program that has involved more than 120,000 students. It says it has planted over 15 million native trees and understorey plants across Western Australia; in 2024-25 it planted 42,899 trees on 22.6 hectares.
What they run
Riparian and woodland restoration at Guildford Meadows, Reg Bond Reserve (Viveash), Dabakarn (Chittering), Wagin and other WA sites, planted largely by volunteers at free winter community planting days.
Volunteer-run nursery established in 1987 that propagates more than 200 WA native species for its own projects, councils, friends groups and landholders.
School program running since 1980 in which students grow and plant native seedlings; over 120,000 young people have taken part.
Trees by type of work
| Activity | Trees | Years |
|---|---|---|
| 馃摚 Education & advocacy | 2,500,000 | 2026 |
Only figures attached to a named program count here. Organization-wide totals sit in the table below.
The numbers
| Metric | Year | Value | Program | Confidence | Source |
|---|---|---|---|---|---|
| Hectares restored | 2025 | 23 | Organization-wide | Self-reported | sourceAnnual Report 2024-25, p.7 infographic: '22.6 hectares restored' (site pages list 21,580 seedlings/6.2 ha at Guildford Meadows, 15,679/14.7 ha at Dabakarn, 3,000/1.13 ha at Reg Bond Reserve, 600/0.53 ha at Wagin) |
| Trees planted | 2025 | 42,899 | Organization-wide | Self-reported | sourceAnnual Report 2024-25, p.7 '2024-25 Highlights' infographic: '42,899 trees planted', '22.6 hectares restored', '150k plants grown', '216 species propagated' |
| Trees plantedto date | 2025 | 15,000,000 | Organization-wide | Self-reported | sourceAnnual Report 2024-25, p.4: 'we have planted over 15 million native trees and understory across Western Australia since 1979' |
| Volunteers engaged | 2025 | 530 | Organization-wide | Self-reported | sourceAnnual Report 2024-25, p.7 infographic: '530 planting volunteers' and '212 regular volunteers' |
| Seedlings produced | 2025 | 150,000 | Hazelmere community native plant nursery | Self-reported | sourceAnnual Report 2024-25, p.7 infographic: '150k plants grown'; the nursery section text says 'volunteers and staff produced almost 200,000 plants across more than 200 species' |
| Trees plantedto date | 2026 | 2,500,000 | SPROUT! Trillion Trees Schools Program | Self-reported | sourceAbout Us page: over 120,000 young people have taken part in SPROUT! and planted 'more the 2.5 million trees' |
How they report
What earned it
- 5/20 Publishes annual tree figures: 1 year of annual figures on record (5 points each, up to 4 years)
- 15/15 Figures are recent: Latest annual figure is for 2025
- 10/10 Every figure has a public source: 6 of 6 figures link to a source
- 0/15 Publishes financials or cost per tree: No financial figure recorded
- 0/15 Reports survival or monitoring: No survival or monitoring figure
- 0/10 Independently verified figure: All figures are the organization's own
- 10/10 Breaks figures down by program: Figures attached to named programs
- 5/5 Reports volunteers or events: Volunteer figures on record
- Latest annual figure
- 42,899 trees in 2025
- Trees per volunteer
- 80.9 in 2025
- Compare
- Put Trillion Trees Australia next to others 路 method
Upcoming events
- Nature Care Day - Helena RiverRegisterFri, Dec 11, 2026, 9:00 AM GMT+8 路 Tree care workday 路 Hazelmere