In this contribution, we sketch an application of Earth System Sciences and Cloud-/Big-Data-based IT, which shall soon leverage European supercomputing facilities: smart viticulture, as put into practice by Terraview. TerraviewOS is a smart vineyard ``operating system'', allowing wine cultivators to optimise irrigation, harvesting dates and measures against plant diseases. The system relies on satellite and drone imagery as well as in-situ sensors where available. Clearly, processing behind the UI is heavily based on Cloud Computing, with some Edge Computing close to the user or High-Performance/GPU Computing components. The substantial need for computing power in TerraviewOS, in particular for training AI-based models to generate derived data products, makes the further development of some of its modules a prime use case for the EU-funded Extreme Data processing project ``EXA4MIND'' (Horizon Europe GA No. 101092944). Two of the strongest academic supercomputing centres in Europe take part in EXA4MIND. The collaboration to evolve the ``Smart Moisture Mapper'' subsystem of TerraviewOS in this context is briefly sketched. Connecting database systems, High-Performance-/Cloud-Computing systems and European Data Spaces with appropriate data access and transfer mechanisms, EXA4MIND shall demonstrate competitive advantage in scientific and enterprise data analysis needed in complex applications such as TerraviewOS.