SA Water undertakes revegetation work in historically cleared parts of its large (~80,000 Ha) land holdings across South Australia. Native species are used for this revegetation to concurrently achieve multiple outcomes of catchment management (water quality), biodiversity conservation, amenity and carbon sequestration. To ensure these outcomes can be achieved over the long term despite projections of a drier climate, SA Water and its partners have taken novel steps to ensure the resilience of the revegetation plantings. Underpinned by collaborative research with Adelaide University a new approach to seed sourcing has been established to help mitigate risks posed by future climate change. Previously SA Water solely adhered to principles of ‘local provenancing’ which generally prescribe strict collection of seeds from physically very close to the revegetation site. However the research undertaken demonstrated that seeds sourced from drier parts of a local species’ range produced trees that performed better in revegetation than those from the immediate surrounds. In light of these findings SA Water has adapted its thinking and redesigned its revegetation strategy to use an alternate seed collection protocol termed ‘composite provenancing’. This approach seeks to retain the benefits of using endemic species whilst reducing climate risks by combining locally sourced seed with seed from drier parts of the range in such a way that attempts to mimic the original gene flow dynamics that were interrupted by land clearing and fragmentation. Results have been positive in the short term and monitoring for long term effectiveness is in place.