Wingecarribee Shire Council and the Southern Highlands Botanic Gardens are calling for expressions of interest from artists wishing to participate in this year's Earth Hour celebrations.

In fact they have extended the entry date to ensure greater opportunity for artists to showcase their talents.

Meanwhile entry to the event will be free in an effort to help boost the spirits of the community which has been hit hard with bushfire in recent months.

Council's coordinator environment and health systems Cecilia Kemp said the competition was designed to change the way people see and talk about waste and recycling.

READ ALSO: Cherished country shows boosted by NSW Government sponsorship grants

We can all be a part of sharing the love in the Southern Highlands

Goulburn electorate public schools receive additional funding

"Artists have long been using recycled objects to turn everyday trash into creative treasures," she said. "We're looking for sculptures made from at least 80 per cent recycled material to promote just how beautiful recycling can be."

Prizes will be awarded for both 'Open' and 'School' categories.

First prize for established, emerging or new artists is $2500 with a Highly Commended and People's Choice award also on offer.

In the School category, first prize comprises of a sustainability assessment and workshop plus selected plants to the value of $300. Highly Commended and People's Choice nominations will also be awarded.

To submit an Expression of Interest or learn more about the event visit www.wsc.nsw.gov.au/earth-hour.

Wingecarribee Shire's Earth Hour celebrations will be held from 5pm on March 28 at the Southern Highlands Botanic Gardens, located on the corner of Kangaloon and Old South Roads in Bowral.

The exhibition will remain on display until April 10.