OASIS is a modular urban greening system designed to address unequal access to nature within cities. Developed for UK and Northern European urban contexts, it combines deployable bamboo structures, mobile planters, and climbing plants to create small-scale restorative environments within transitional public spaces. The system integrates layered drainage, bearing-based rotational connections, and modular components to support adaptability, durability, and interaction. Intended to be managed by local authorities or organisations, OASIS functions not as a single installation, but as a scalable public infrastructure that distributes moments of pause, calm, and connection throughout everyday urban life.