Unlike its horizontal equivalent, pruning a vertical surface can be a tricky proposition at best, so species selection done from the outset is a crucial key to success. You need rugged and robust plants fit for the region, for starters.
Rebelo de Andrade thought carefully about the plants picked for the outside faces of this stunning four-story structure, selecting varieties that would weather well and grow (but not too much!) in their environs in Lisbon, Portugal.
Nearly five thousand total plants now thrive along the multiple vertical surfaces of the building, creating a dynamic, slowly-evolving facade as the species vie for water, sunlight and space. As fascinating as it is now, it will be even more interesting to see how this looks in five, ten and twenty-five years.