Yes, organic mix soil can be used for most Australian native plants. The majority of native plants, like all plants, require nutrients to survive, grow, and thrive, and only a small percentage of them have specific nutritional requirements. In particular, the need for low phosphorus levels is a special requirement that applies to just a small subset of native plants. Since organic mix is a premium soil blend enriched with compost for added nutrition, it is suitable for all native plants, except those few that require low phosphorus levels.