# Trillion Trees Australia

> Perth's community tree planters since 1979, formerly Men of the Trees WA, with over 15 million natives in the ground

Source: https://treerm.org/org/trillion-trees-australia · Updated 2026-11-08 · Data license: CC BY 4.0 (https://treerm.org/about#license)

## Facts

- Type: Nonprofit
- Scope: Regional
- Headquarters: Hazelmere, Western Australia, Australia
- Founded: 1979
- Website: https://trilliontrees.org.au
- Volunteer sign-up: https://trilliontrees.org.au/get-involved/volunteer
- Donate: https://trilliontrees.org.au/donate
- Events calendar: https://trilliontrees.org.au/get-involved/events
- Countries where they plant: Australia
- Activity types: Reforestation (primary), Nurseries & seedlings, Seed collection, Education & advocacy
- Trees on record: 15,000,000 (larger of latest cumulative figure and sum of annual figures; trees planted or distributed)

## 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.

## Programs

- **Restoration projects and community planting days** — Reforestation: 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. https://trilliontrees.org.au/get-involved/events
- **Hazelmere community native plant nursery** — Nurseries & seedlings (1987–present): Volunteer-run nursery established in 1987 that propagates more than 200 WA native species for its own projects, councils, friends groups and landholders. https://trilliontrees.org.au/what-we-do/native-plant-nursery
- **SPROUT! Trillion Trees Schools Program** — Education & advocacy (1980–present): School program running since 1980 in which students grow and plant native seedlings; over 120,000 young people have taken part.

## Metrics

> Note: The 15 million cumulative figure counts native trees and understorey plants since 1979 and has been quoted unchanged since at least 2018. The 2024-25 annual report's infographic says 150k plants grown while its nursery text says almost 200,000 plants were produced in the same year; the infographic figure is recorded. The organisation was Men of the Trees WA until 2019.

| Metric | Year | Value | Cumulative | Program | Confidence | Source |
|---|---|---:|---|---|---|---|
| Hectares restored | 2025 | 23 | no (that year) | organization-wide | Self-reported | [source](https://trilliontrees.org.au/assets/uploads/images/TT-Annual-report-2024-25-FINAL.pdf) Annual 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 | no (that year) | organization-wide | Self-reported | [source](https://trilliontrees.org.au/assets/uploads/images/TT-Annual-report-2024-25-FINAL.pdf) Annual Report 2024-25, p.7 '2024-25 Highlights' infographic: '42,899 trees planted', '22.6 hectares restored', '150k plants grown', '216 species propagated' |
| Trees planted | 2025 | 15,000,000 | yes (to date) | organization-wide | Self-reported | [source](https://trilliontrees.org.au/assets/uploads/images/TT-Annual-report-2024-25-FINAL.pdf) Annual Report 2024-25, p.4: 'we have planted over 15 million native trees and understory across Western Australia since 1979' |
| Volunteers engaged | 2025 | 530 | no (that year) | organization-wide | Self-reported | [source](https://trilliontrees.org.au/assets/uploads/images/TT-Annual-report-2024-25-FINAL.pdf) Annual Report 2024-25, p.7 infographic: '530 planting volunteers' and '212 regular volunteers' |
| Seedlings produced | 2025 | 150,000 | no (that year) | Hazelmere community native plant nursery | Self-reported | [source](https://trilliontrees.org.au/assets/uploads/images/TT-Annual-report-2024-25-FINAL.pdf) Annual 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 planted | 2026 | 2,500,000 | yes (to date) | SPROUT! Trillion Trees Schools Program | Self-reported | [source](https://trilliontrees.org.au/about-us) About Us page: over 120,000 young people have taken part in SPROUT! and planted 'more the 2.5 million trees' |

Confidence: self-reported is the organization's own published figure; independently verified means a third party confirmed it; estimated means TreeRM derived it and the note says how.

## Upcoming events

- 2026-12-11 — Nature Care Day - Helena River (Tree care workday), Hazelmere — register: https://events.humanitix.com/nature-care-day-11th-december-2026 — https://treerm.org/events/trillion-trees-australia/nature-care-day-helena-river-2026-12-11.md

## Links

- instagram: https://www.instagram.com/trilliontrees_au
- facebook: https://www.facebook.com/trilliontrees.org.au/
- linkedin: https://www.linkedin.com/company/trillion-trees/

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