Tree preservation and planting
This page contains information about how the city maintains its trees and selects tree species when replanting is required.
The preservation of existing street trees is of prime importance and practical techniques are used to maintain their health. The city recognises that trees have a natural life span and plan for their eventual removal. It is also recognised that the continuing development of the city may render some trees inappropriate.
In such circumstances, tree removal may be necessary. By recognising circumstances where removal is appropriate, tree replacement can be planned ensuring the continued quality of the overall streetscape.
Street tree planting
As part of its Street Tree Policy, the city undertakes an annual street tree planting and replacement program in winter to:
ensure a minimum of one tree is planted in the verge adjacent to each residential property
ensure the development of streetscapes to their full potential following removal of the constraints of power lines
address gaps in streetscapes
complete approved streetscape improvement projects
replace street trees removed
meet resident requests for street trees.
The objective for all streetscapes is to create a balanced avenue effect. Street tree selection guidelines are based on the characteristics of an established tree. A distinction is made between east-west and north-south aligned streets to take advantage of solar access benefits in winter from deciduous trees. A further distinction is made between broad frontage and narrow frontage streets.
The city takes into account numerous aspects when determining appropriate species selection. The physical constraints of the site are considered, including verge width, building setbacks, overhead power lines, the need to allow for pedestrian or vehicular movement, underground services and public safety.
Physiological factors are considered for each species selected, at all growth stages, including form, height, spread of canopy, rate of growth, life span, adaptability to canopy pruning and the potential adverse effects of flowers and fruits.