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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 Volume 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

Field Guide for Watering Newly-Planted Trees

Posted on 18 May 2017 in Planting/Establishment

The following 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 carefully monitor the trees in your project(s), paying particular attention to drainage and leaf droop, and vary as needed.... 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

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

Posted on 24 October 2014 in

The concept of "size index", needs to be understood by all tree growers and users. As a measure of a tree's physical size, size index was an important concept In the NATSPEC specification and has continuing importance under the comparatively new Australian standard AS 2303 - to determine whether a tree is appropriately sized for its container and to enable a quick comparison between trees being offered by competing suppliers. ... 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