The City of Unley is known for its wide, tree lined streets.

Unley's Street Trees

To maintain the beauty and health of these street trees, we have an arboricultural team of who look after established trees and nurture young trees to assist them to grow.

Residents are encouraged water the trees to help them survive in hot weather and contact us if they believe the tree needs additional care.

The City of Unley covers an area of about 14 square km, in which between 26,000 and 27,000 public trees are growing. There are about 23,000 street trees and 3,000 to 4,000 trees in parks and reserves.

The quintessential Unley streetscape features beautiful leafy borders provided by the street trees, of which about 70 per cent are exotic species, 30 per cent are native and 1 per cent are indigenous to the local area. Most of Unley's street trees are mature, with 200 to 300 new trees planted each year. The estimated total economic value of street trees in Unley is $150 million.

Tree Tags in Parks

 Over Spring/Summer 2017, we are using tree tags to highlight the benefits of trees and increase our community’s awareness of the value of trees.

Each tag has information specific to that tree such as its species name, height, ability to remove pollution from the air and more.

There are 80 tags spread across the following six locations:

  • Goodwood Oval - Curzon Avenue, Millswood
  • Page Park - Corner Cross Road and East Avenue, Clarence Park
  • Unley Civic Centre - 181 Unley Road, Unley
  • Heywood Park -  Addiscombe Place, Unley Park
  • Windsor Street Linear Trail - Windsor Street, Fullarton
  • Fullarton Park - Corner Fisher Street and Fullarton Road, Fullarton

Trees receiving the tags were selected with the help of local volunteers. All tags have been printed on 100% recycled plastic materials to ensure they are weatherproof.

Please head on out and find some tags, hug some trees and learn about all the wonderful things our park trees provide us!

Around Powerlines

ETSA Utilities is an electricity entity within the meaning of the Electricity Act, 1996 and as such has a duty under Section 55 of the Act to keep vegetation clear of powerlines.

The Electricity Act (1996) specifies that vegetation must be kept away from powerlines by a margin referred to as clearance and buffer zones. The distance for each of these is determined by the act and varies depending on the voltage of the powerline and the type of location which determines its risk level.

Under the Act all trees must comply with a clearance zone including trees on private properties. Residents are responsible for pruning trees around private supply lines from the property boundary. If you require advice or assistance, contact ETSA Utilities by phoning 131 261.

In the event of an electrical emergency ETSA Utilities will take over operations and including vegetation clearance.

Development regulations now require all applicants to submit a Declaration of the Applicant with their development application.

For more information on vegetation clearance near powerlines visit the SA Government’s website.


Ridge Park Trees

Multiple Benefits of Trees at Ridge Park

A risk assessment of the trees at Ridge Park was recently undertaken, and while we were there we ran the information through i-Tree Eco assessment to learn more about how our trees benefit the park and the ecosystem services they provide.

View the full Ridge Park Tree Report on the i-Tree website.

Ridge Park Tree Facts
  • Number of trees: 683 (58 species)
  • Total canopy area: 40,226m2 (equivalent to ~77% of total park area)
  • Most abundant and diverse genus: Eucalyptus (274 tees; 12 species)
  • Proportion of small trees (<20cm diameter breast height, DBH): 53%
  • Proportion of very large trees (>100 DBH): 4.25%
  • Structural value: $3,093,814
  • Pollution removed: 203.56 kg/yr
  • Carbon stored: 342 tonnes
  • Carbon sequestered: 10.08 tonnes/year
  • Avoided storm water run-off: 254.5 m3/yr

Trees at Ridge Park

Heywood Park Tree Management

Heywood Park (Addiscombe Place, Unley Park) is a significant park within the City of Unley. The park offers a wide range of play activities for all ages, the opportunity for recreation and regularly hosts high profile events. The park is one of the few natural settings within the area and home to the last remaining Grey Box trees (Eucalyptus microcarpa) on the Adelaide Plains. Many of the trees in the park are remnant and pre-date European settlement.

In the past few years there have been some significant tree failures within the park which have raised concerns within the Administration as to the overall health and condition of the trees and the associated risk for park users. We have a duty of care to ensure parks within the City are as safe as reasonably possible for users.

The frequency and significance of some of these failures has prompted Council to undertake a detailed risk assessment of the trees within the park as a precursor to developing a tree management plan. The risk assessment has identified a number of trees which require some reasonably urgent attention.

In response to a New Initiative request during the 2014/15 budget process, the Council allocated funding to undertake a Tree Risk Remediation Implementation Program within Heywood Park. The Administration has sought and been provided with detailed independent arborist advice which recommends the removal of numerous trees within the park including some which are Regulated and Significant (in accordance with the Development Act 1993). The program also includes maintenance tree pruning within the park.

Additional Information

Heywood Park Tree Management - Council Information Report
Heywood Park Tree Management - Full Arborist Report - Arborman
Heywood Park Tree Management - Resident Notification Letter

Adopt a Tree

"A city without trees isn't fit for a dog" (TREENET's motto)

Visit TREENET’s website.

"By protecting and caring for street trees, we can do our bit to conserve habitat, reduce the city’s contribution to climate change, and make a better place for us all to live."

Chris Daniels - Professor of Urban Ecology, University of South Australia.

  • Street Tree Maintenance
    The City of Unley runs a maintenance program for street trees. The program includes identifying and treating pests and disease, pruning of the younger trees and crown maintenance and modification in mature trees. Trees less than three years old are watered every few weeks during dry summer months.

    However as a result of recent years of drought and water restrictions, many street trees in the City of Unley are stressed and some are dying.

    In the past, mature street trees relied on water sourced from the front gardens of residential properties. Many of these garden areas are no longer watered and the street trees are now suffering. The Council simply does not have the resources to care for each individual street tree.
  • Adopt a Tree Program
    We're calling on residents, businesses and groups in the community to work in partnership to save our 23,000 street trees. Anyone in the Unley community can register as a tree adopter.

    Adopters can care for a street tree (or several trees) in one or many ways. For example:
    • Observing the street tree and reporting any changes to us
    • Removing weeds
    • Watering the tree
    • Making changes to their front garden to support the street trees

    We can support adopters by providing advice, resources and/or physical assistance where needed.

    A member of our arboriculture team will visit your street tree(s) to conduct a tree inspection. This will involve advice and information on how to care for your street tree(s).

    We will provide a tag to identify the tree(s) you have adopted, tree adoption papers and resources to help care for the tree(s) if required, including a bucket and fact sheets.

    We also provide support and advice through public education programs and regular correspondence with tree adopters.

    To find out more, phone 8372 5111 or email

Street Tree Removal

The City of Unley recognises the important contribution trees and vegetation make to the community.

Such assets provide environmental benefits by way of supporting flora and fauna, addressing the negative impacts of climate change while creating a living environment that adds character to the streetscape and economic value to property.

We commit significant resources to ensuring our City has the best possible streetscape and park environments through the effective management of our trees and understorey planting while encouraging the community to play an important part.

Prudent management of the City’s trees is essential if we are to fulfil our responsibilities and manage our liabilities in relation to Section 245 of the Local Government Act 1999. In so doing, all reasonable effort is to be made to accommodate, or to find consensus within, the preferences expressed by the community in relation to the management of all Council-owned trees.

It is acknowledged that trees are not permanent fixtures for all time. They have a life cycle and there comes a time when trees decline to a stage where they must be removed or when disease or damage means that replacement of trees is the most responsible long-term approach.

Furthermore, it is acknowledged that in this urban environment the removal of trees is sometimes necessary to facilitate property development or the installation of infrastructure.

Download the Street Tree Removal Form.

For further information, download the Vegetation adopted by Council Management Policy.