System Ondugreen

Growing Mediums: Ecological Solutions With Local Materials


For the growing mediums of the system Ondugreen we use recycled natural clay tile chippings instead of synthetically obtained substrate such as lava, pumice, etc. because the organic content decomposes and prevent the drainage resulting in plant failure.


Ondugreen Ideal Plants

The choice of the materials is also essential for the ecological point of view which is behind the green roof idea; therefore the waste material of the clay tile production is utilized in an effective way for the environment. The “Zincolit”, a recycled mineral bulk material on the basis of clay tile chippings and the plant soil enriched with the organic material "Zincohum" have been choosen as the most suitable growing medium for green roofs specially for sedum species for which they provide stable long term nutritient supply and resistant to frost and wind erosion. The duo Zincolit+Zincohum are the unchangeable contents of the green roofs.

Best Suitable System Susbstrate
for Green Roofs.


1- Crushed brick
2- Plants
3- Harrow and sifter
4- Compost facility
5- Mineral content
6- Organic content


Click on the icon below to see technical details.



 Ideal Plants For Roof Gardens

In extensive green roofs plant material should be chosen from maintenance free species. Sedum Carpet" is a low, ground-covering extensive green roof vegetation on a substrate layer of approx. 60 mm which is mainly applied where - apart from low weight - also low maintenance costs are demanded. There are a wide variety of sedums, herbs and grasses that meet these requirements. They come in a wide range of leaf and flower colours and they root quickly. In general planting should be done between spring and early fall but the fastest growing result can be obtained by planting in March-April. The main flowering season of the "Sedum Carpet" is in early summer. The dominating colours are yellow and red/white.



Click on the icon below to see technical details.



Ondugreen Ideal Plants For Roof Gardens
The 6 or 7 different low-growing Sedum species which belong to the plant community "Sedum Carpet" are spread as shoots or applied as plants with small root balls over the Zincolit substrate layer and covered with 10-15 l/sqm Zincohum plant soil and irrigated. With this method by using 50 g/sqm of sedum carpet we may obtain a perfect roof garden within 2-3 years. For bigger roof surfaces it is possible to spread the shoots of sedums, seeds of mosses, herbs and grasses with pressurized water pump.