This document summarizes a presentation on the CLL Knowledgebase project for sharing best practices in sustainability. The project aims to create an open system to catalog diverse sustainability solutions for urban planning challenges. It seeks to provide examples and planning tools to help address the complexity of sustainability issues in a way that spurs creative and evolving solutions. The document outlines the context, objectives, description, stakeholders and realization steps of an urban farming case study from Zagreb, Croatia meant to test experimental land use.