For this weekends event, thousands of rocks have already been painted.
At Te Manawa Museum, an open art class called NOA meets twice a week where anyone can come in and get creative. They're pledging 50 rocks for the cause.
"We believe art is social glue. Art is really important for activating people in the community and enlivening public space. And we love Palmy Rocks," Aroha Lowe said.
It's a craze that's showing no sign of waning. Instead more and more people are climbing aboard.
"I think that's one of the key successors about Palmy Rocks is it's for everyone. We can all participate. And also here at NOA we really believe that we can lead from any chair and it's important we can bloom where ever we are planted," Lowe said.
And the best part is just like most rock stars, these ones have no rules.
"It's pretty hard to control so we just say if you're painting rocks you're putting them out to the universe and see what happens next. Paint your rocks, give them a big hug and set them free," Knox said.
Made with funding from