About 60 people attended.

Wimmera Health Care Group chief executive Chris Scott said the garden would help 500 children each year.

"The rehabilitation garden has been 10 years in the planning, but it would not have been possible without the financial support of the Wimmera Health Care Group Foundation, the Murray to Moyne Relay team and 50 Years of Wimmera Rock who all made substantial donations,'' he said.

"Other supporters have included Studio GAS, the Wimmera Health Care Group band 'All Stitched Up' and numerous individuals.

"I would like to thank the Wimmera Health Care Group allied health services team for researching the design and plan of the garden, as well as therapy aids, the engineering department which worked hard to bring this project to fruition and Nichola Clarke, local award-winning artist, who painted the magnificent mural on the walls."

Mr Scott thanked Horsham Mitre 10 for donating paint, Tony Patten and health care group environmental and food services staff and Robyn Lardner and Bronwen Clark for organising the opening.

"Our next project is a rehabilitation garden for adults and a philanthropist has already made a significant donation towards this important project," he said.

Chief occupational therapist Kristen Coats said the allied health services team had visited Victorian rural and metropolitan rehabilitation centres when planning the garden.

"We decided we needed a multi-functional room encompassing bright colours and fun and stimulating therapy aids,'' he said.

Chief physiotherapist Hayley Crute said many children, including those with cerebral palsy and acquired brain injuries, would use the garden.

"They will work with a physio-therapist as required on language analysis and motor skills with minimal noise and disruption," she said.

She said plans for an adult rehabilitation garden with sporting equipment and reflection area were underway.

A 'new look' Wimmera Health Care Group Foundation was also launched by chairman Don Johns.

Mr Johns said the group had contributed $15,000 to the paediatric rehabilitation garden.