A new national recovery plan has been adopted to help save the world's only wild macadamia plants from extinction.

Shock finding In 2019, Queensland researchers were shocked to discover the global macadamia industry may have originated from nuts from a single tree or a small number of trees taken from Queensland to Hawaii in the 19th century.

"We reviewed the plan, and then it just got stuck in politics, and we've been anxiously lobbying to get the new plan approved because it really does guide our actions for conserving wild macadamias," Ms Bond said.

The recovery plan notes that populations of wild macadamias on private land in Queensland are generally located where protective fencing and weed control would have little or no negative economic impact on the viability of farm enterprises.