Duel of landscape gardener S09 E17 A new roof garden for Jan and Roland (Episode 140)

Jan Waßenberg and Roland Wissel live on the 23rd floor of the Rheinstern high-rise in Cologne, they have so far lacked ideas for their terrace. They want a roof garden that fits their style of living – and exudes the atmosphere of Southern California. This is the special challenge faced by gardening and landscaping expert Sebastian Burggraf and horticultural engineer René Pütz.