Trees and Soil

Soil that Grow Big Trees

Trees have a genetic potential, to unlock their potential we need to supply them with sufficient volumes of the right quality soil.

Our mission is to help you establish tree canopies that perform to their genetic potential, in our built spaces – and quality soil, in the correct volumes, is essential. Trials have proven that the best way to grow healthy trees,  is to provide the right volume of good quality loam soil. This of course needs to be combined with soil moisture, oxygen, and nutrients. This growing material becomes what we call the primary rooting zone for the tree.

Correct use of quality soil, tested against performance specifications, is the ‘secret sauce’ for tree growth and attaining the vision you have for your project. Too often, soil is overlooked to the detriment of the tree canopy. Soil type usually refers to the different sizes of mineral particles in a particular sample.

Each size plays a significantly different role. For example, the largest particles, sand, determine aeration and drainage characteristics, while the tiniest, submicroscopic clay particles are chemically active, binding with water and plant nutrients.

The goal has been to produce a stable growing medium that maintains uniform air filled porosity with depth, exhibits good drainage, and retains as much moisture as possible for healthy root growth between  watering events. The base material is volcanic rock, which is angular and of a particle size distribution which produces an open structure that allows roots to penetrate and water to drain.

“Great customer service, quick response times and a very in depth QA system with constant support.”

- Laura Wiesenekker, Project Engineer, Densford Civil -

“Citygreen is a very professional  business, and I found everything was great in terms of deliveries, product supply and information. It was all forthcoming and helped us to complete the project.”

- Keith Burns, Architect/Designer, Keith Burns Architect -

“Citygreen offered training and invaluable technical assistance during the works.”

- James Callan, Estimating Manager, Complex Co Pty Ltd -

“Our experience, in working with a Citygreen Design Studio was second to none. We found responses from the design studio to be very timely, and technically thorough. We went backwards and forwards a number of times, looking at different iterations of the design and, nothing was too much trouble to examine and explore different possibilities. I would highly recommend the Citygreen Design Studio to any future client considering using your services.”

- Sandra Smith, Principal Landscape Architect, City Of Monash -

“We are big on compliance on all projects, and the fact that their SmartCertify cloud platform covers all bases, and supports their 20 year warranties, is critical – especially that these pits are being installed under roadways and footpaths.”

- Johny Purkaystha, Civil Program Engineer, Central Coast Council -

"I reviewed all the previous projects that we have installed in the past couple years using your product and I can happily report back that we have 0% mortality in the soil cells, which is incredible!"

- Brendan Wilton, CEO, Trim Landscaping, Bedford, Canada -