The pink bougainvillea sits in stark contrast to the rubbish and rubble - a piece of defiant beauty on the barren site that has broken the hearts of Bali bomb survivors.
It was put there by Kingsley Football Club members last week, placed against a fence so its branches can wrap around it as it grows.
"We hope that whatever happens to this site, the tree will become a permanent part of it," Robyn Ross, who lost her son, David, in the blast, said.
The rundown state of the former Sari Club site - which is being used as a carpark and makeshift urinal for drunks from surrounding bars - angered relatives and survivors returning to Bali last week for the 10th anniversary.
It prompted Prime Minister Julia Gillard to sympathise on Friday: "I do understand why it distresses people to see it in the condition that it is now."
On Friday night, angry families of some of the 88 Australians who died in the attacks linked arms at the site's entrance and refused to let cars and motorbikes in as the clock counted down to the exact minute that their relatives had died 10 years earlier.
"It broke my heart to walk in here and see a carpark on the site," Mrs Ross said the next morning when she went to check on the tree.
"I had been told that it was a carpark (but) it was so much more shocking to see it and see people coming and going."
Mrs Ross said the 10th anniversary commemoration of the bombings had been cathartic.
"We wanted to show we wouldn't be intimidated by terrorists," she said. "This is where David died and we'd like to see the Balinese people keep going. To show this tragedy has brought the Indonesian and Australian people closer together."