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Root Barriers – Where to put them?

Posted on 19 May 2017 in Planting/Establishment

Tree professionals are charged with the task of ensuring that the trees installed into our urban landscapes have the resources they need to thrive and be safe for the long-term. But, they are also frequently asked to install root barriers so that the developing roots will not adversely impact on nearby engineered structures. ... Keep reading

Estimating the Likely ‘Diameter at Breast Height’ of Mature Trees

Posted on 19 May 2017 in Planting/Establishment

Diameter at Breast Height (DBH) is an important descriptor of tree size and bulk. When making decisions in a number of situations, it is important that we can estimate what the DBH might be when the tree has matured.... Keep reading

Estimating Soil Volumes Needs of Trees in Urban Situations

Posted on 19 May 2017 in Planting/Establishment

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 not available), we need to provide some that are.... Keep reading

Watering newly-planted trees

Posted on 19 May 2017 in Planting/Establishment

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.... Keep reading

Where Should You Put The ‘Root Crown’?

Posted on 1 December 2015 in Planting/Establishment

Correct placement of the ‘root crown’ is essential for the long-term success of your trees.... Keep reading

Estimating the “Zone of Upheaval”

Posted on 12 March 2015 in Planting/Establishment

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 extreme forces in an area around the tree known as the “Zone of Upheaval”.... Keep reading

Our Best Urban Native Tree

Posted on 12 March 2015 in Urban Forest Generally

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 the urban landscape.... Keep reading

The concept of “size index” - calculating the physical size of trees

Posted on 24 October 2014 in

As a tree grows, it becomes taller and its trunk diameter increases. Tree sizes are customarily described by reference to their "height" (expressed in metres) and their "calliper" (trunk or stem diameter, expressed in mm, and measured at 300 mm above ground level). Some species are naturally stocky – thick stemmed and, comparatively short. Some, naturally taller, possess a more slender trunk or stem.... Keep reading

Buying big landscape trees – are you paying too much?

Posted on 24 October 2014 in

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?... Keep reading

Not dead – just disappointing

Posted on 7 July 2014 in Root Systems

At Trees Impact we persistently push the ‘quality’ message. But preach as much as we like, decision-makers actually need to see what we are talking about to appreciate that message. So…... Keep reading