Projects
Supply of Trees to Sydney’s Light Rail project
This project involved the contract growing and supply of trees including 130 Zelkova serrata “Green Vase” to the Sydney Light Rail System project between 2015 and 2021.
Articles
Estimating Soil Volume Needs of Trees in Urban Situations
Urban soils are generally disturbed, often compacted, and the soil chemistry is commonly less than ideal – so it is often not much use to trees. However, in urban situations the amount of soil trees can access is critical to their long-term success. If existing soils are not suitable (or Read more…
Articles
Field Guide for Watering Newly-Planted Trees
The following (downloadable) table gives suggested water application rates, frequency, and duration based on the best information available. It’s important to remember that these and actual water needs will vary according to a range of site conditions and species. Please also remember these suggested rates are broad estimates only. Always Read more…
Articles
Watering newly-planted trees
THE CHALLENGE: When you invest in new trees, you don’t just want them to survive – you want them to thrive. Of course, new trees need water and most short-term problems are linked to inadequate, excessive, or inefficient watering. (See ‘The Critical Importance of Moisture’). So, how much water should be applied, Read more…
Articles
Where Should You Put The ‘Root Crown’?
Correct placement of the ‘root crown’ is essential for the long-term success of your trees. The structure of the roots of trees has evolved to suit life below ground. Similarly, the above-ground parts of the tree have evolved to live and grow above the ground. The junction where those below-ground Read more…
Articles
Our Best Urban Native Tree
LOOK AROUND When you are next driving through an established part of Sydney, Melbourne, Newcastle, or any of our other major eastern centres (particularly just after a storm), look around you and note the trees that look to be the healthiest, the bushiest and make the greatest positive contribution to Read more…
Articles
Estimating the “Zone of Upheaval”
Minimising damage arising from the interaction between roots and hard surfaces. THE PROBLEM As a tree grows the base of the stem expands (trunk flare) and the diameter of the primary roots increases, particularly close to the base of the stem. These two phenomena can result in the generation of Read more…
Projects
Trees for City of Adelaide
The City of Adelaide approached Trees Impact for some trees with immediate impact when rejuvenating their Rundle Mall in the Adelaide CBD.
Articles
Buying big landscape trees – are you paying too much?
How do you compare different prices for what is, allegedly, “the same sized tree”? Is pricing based on container size fair? Is pricing by tree size more fair? What is “pricing by size”? Can “pricing by size” save you money? Pricing by tree size, as opposed to container size, offers Read more…
Articles
Understanding the concept of “size index” – calculating the physical size of trees
For the tree buyer/user, using AS 2303 and the concept of size index is an easy-to-use tool for assessing or comparing quality, compliance with specification and value for money between competing suppliers – given that trees are traditionally quoted according to container size only; and that tells us little about Read more…