Most landscape projects share a similar history: they start with an idea, continue with seemingly endless planning iterations of each profound planning phase and end in a more or less successful fabrication stage. As the size, budget, and timeframe of the project are often fluctuating during the process, digital methods can help us to cope with them. This paper reports about digital methods used to realize the project “Summer Island” at the Bundesgartenschau (BUGA) 2019 in Heilbronn, a big scale landscape project as a part of the Federal Horticultural Show in Germany.