This article analyzes the artistic and expressive potential of the alla prima technique used in watercolor painting, as well as its role and significance in landscape composition. The study examines the theoretical foundations of the alla prima technique, its distinctive features in conveying color and tonal relationships, its capacity to depict atmospheric conditions, and its specific applications within the landscape genre. Furthermore, the importance of this technique in creating spatial depth, aerial perspective, and compositional unity is substantiated from a scientific perspective.