Hundred of sculpture works from all over the state will be hidden across the gardens at ErinEarth this weekend as part of the organisation's biannual exhibition.
Staff at the gardens will be installing the works on Friday ahead of the unveiling that evening.
"We've done a walk around to know the layout, where everything will be going," said garden manager Kaz Leary.
"We'll be installing them all day Friday so they're ready to be seen under lights. They'll be all over the garden so you can find the sculptures as you go along."
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The works have been contributed by 10 different artists from the Riverina, Sydney and Southern Tablelands.
With this being the garden's third exhibition in six years, many of the artists are returning to Wagga following a challenging 12 months.
Each sculpture will be available to purchase to be picked up after the three-day event concludes on Sunday.
"It's good for the artists to be able to sell some of their works after the year we've just had, and it's good for us because we'll get a small commission which will go back into funding the maintenance of our garden," Ms Leary said.
Tickets for the event can be purchased at the centre on Kildare Street, with staff working additional hours this week to accommodate the exhibition set-up.
"On Saturday evening we'll be open to the public and people are encouraged to bring a picnic," Ms Leary said.
The gardens have been running for just over 20 years, having been formed by the Presentation Sisters in 1997.
"I think we're quite unique in that we have this garden here in the middle of our city," said garden educator Ben Holt.
"It was reclaimed from some tennis courts and a rubbish dump and it's been established by volunteers over the last 20 years to demonstrate sustainable living in the community."
Mr Holt said the biannual outdoor exhibition is consistently the largest event run by the gardens.
"Hundreds turn up each time. I suspect this will be our biggest event ever because in the past our crowds have been going up and up, and there's been a lot of attention on it this year," Mr Holt said.
"You'd usually have to travel to Sydney, Melbourne or Canberra to see something like this."
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