Selection of vegetal species

The selection of the most appropiated plants is an important question. The aspects that are being considered in the project are : preferent growing directions, speed of growing, maximum size and structural loads, selection of suitable decidous/evergreen species (the periods without leaves must be selected according to the heating/cooling demands of the
buildings), volume of earth substrate, attraction of animals (birds, insects), low toxicity, main­tenance works needed and their frequency and commercial availability.