A long-term trial on growing shrubs in Brecht roof-garden units
Mussel, H., 1981: A long-term trial on growing shrubs in Brecht roof-garden units. Zeitschrift fur Vegetationstechnik im Landschafts und Sportstattenbau 4(3): 115-117
Brecht roof-garden containers are described. They are made of Styropor and measure 100 X 50 X 19 cm. Juniperus communis (cv. Hornibrookii), J. horizontalis (cv. Glauca) and Potentilla fruticosa (cv. Arbuscula) were grown in the containers using 4 substrates.