In cooperation with

Gustav Mahlerplein Amsterdam

The Gustav Mahler square is located in the middle of the Zuidas near the Amsterdam Zuid trainstation. In 2016, a bicycle shed was built under the square and the municipality took this opportunity to turn the square from a gray appearance into a pleasant green environment.

Amsterdam, The Netherlands
Water capacity
2800 m²


Take a closer look at this project at Gustav Mahler square:

In addition to the positive change from this gray square to a pleasant green environment, the trees provide an additional advantage: a better wind climate around the buildings. In addition to the green appearance, it mainly had to become an experience environment where people can meet each other in peace or have lunch together on the seating edge of the tree sections.

The idea of the raised tree sections came from Tom Muller, chief designer of public space at Zuidas, who is also responsible for the range and further design of the square.


Trees capillary System

With the Permavoid Capillary Irrigation System an artificial groundwater level is created beneath the rootzone, mimicking groundwater in a natural situation, enabling the growing site to capture, store and reuse stormwater for irrigation. In this arrangement trees prevent stormwater entering the sewer whilst simultaneously enjoying a water reservoir to sustain growth during prolonged dry spells.

The Permavoid Capillary Irrigation System is equipped with specially developed fiber columns that provide capillary transport of water from the Permavoid retention buffer to the rootable soil above. This natural irrigation system uses no energy and maintains a consistent soil moisture content such that the tree experiences a very stable groundwater level, allowing it to thrive in the urban environment.

See how we do Trees

Inspiring projects

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Permavoid source control ensures that no precious water goes to waste by catching, storing and reusing stormwater for irrigation, evaporation and infiltration. Find your local Permavoid distributor here to learn more about the technology and become part of the international movement.