MILDURA worker shortages cannot be blamed on any one cause, says Mildura City Heart manager Danielle Hobbs.

"No one seems to be able to put their finger on it because it's not just one thing," she said.

Ms Hobbs put the worker shortage down to multiple factors, such as visa rules, school interruptions and having less time to train new workers among others.

Ms Hobbs said when businesses were sho...