City and countryside, by their mutual dependency, constitute a unique system, which is the basis for the development of a global landscape. This interaction is far from the country being simply the city’s food supply. The interaction should be reinforced through ecological corridors allowing the biodiversity movement that guarantees the landscape identity. In this regard, life’s standards are strictly related to the landscape quality. Moreover, landscape biophysical features determine the vegetal potential and consequently their uses and techniques adopted by man toward his territorial settlement. Contextually, two Iberian case studies have been selected and analyzed from a multidisciplinarity perspective, aiming to determine how vegetation series may influence the maintenance and sustainability of urban green spaces. Bearing this in mind that a landscape architecture project is dynamic and considering the fourth dimension: time—mainly regarding the vegetation development, creating new volumes and spaces‑considering their natural evolution, a deep knowledge of the plant material is seen as a critical factor for a sustainable landscape planning at several levels.