Tiny forests are beginning to flourish across Sydney as councils, environmental organisations and local communities work together to restore the city's tree canopy and combat the effects of urban heat. Using the Miyawaki method—a technique that involves planting a dense mix of native species in enriched soil—these compact forests are growing rapidly in small, previously underused urban spaces.
One of the most successful examples is located at West Pymble Village Green in Sydney's northern suburbs. Just two years after planting, the once-empty grassy area has transformed into a thriving native forest reaching heights of around seven metres. The project recreated part of the endangered Sydney Turpentine-Ironbark Forest ecosystem, providing habitat for birds, insects and other native wildlife while also delivering much-needed shade for the surrounding community.
The initiative has been led by environmental organisation Earthwatch Australia, which works alongside local councils and volunteers to establish these miniature forests. The process begins by enriching the soil with compost, organic matter and beneficial microorganisms before planting a diverse range of native trees and shrubs very close together. This dense planting encourages the trees to compete for sunlight, resulting in faster upward growth than conventional landscaping methods.
Urban planners say tiny forests offer a practical solution for suburbs where there is limited space for large parks or traditional revegetation projects. Even plots as small as 200 square metres can become thriving ecosystems within a few years. Besides increasing tree canopy, the forests help lower surrounding temperatures, improve air quality, absorb stormwater, reduce noise pollution and create welcoming green spaces for local residents.
Sydney's overall tree canopy has gradually increased in recent years, but coverage remains uneven across many neighbourhoods. Highly urbanised suburbs often have fewer mature trees, making them more vulnerable to extreme summer temperatures and the urban heat island effect. Environmental experts believe tiny forests can help fill these gaps by converting neglected reserves, school grounds and roadside spaces into productive green habitats.
Community involvement is a key part of the projects, with schools, volunteers and local residents participating in planting days and helping maintain the forests during their early years. Once established, the forests become largely self-sustaining, requiring minimal irrigation and maintenance while continuing to support biodiversity and improve environmental resilience.
As Sydney continues to experience population growth and rising temperatures linked to climate change, experts believe these compact native forests could become an increasingly important feature of urban planning. By transforming small unused spaces into thriving ecosystems, the projects demonstrate that even modest community-led initiatives can make a significant contribution to cooling neighbourhoods, restoring biodiversity and creating healthier, greener cities for future generations.
