She confronted the man, and after a conversation with him had suspicions neighbours had put him up to it.
"I heard there has been this plotting to cut my berm while I wasn't looking ...
"I feel I'm being ganged up on from all sides by people who are meant to be my neighbours."
While she trimmed the berm outside her home, she stopped mowing the lawns inside her property two years ago.
"When you mow your lawn, you destroy the ecosystem because you take away the bees and the flowers.
"And when the grass is shorter, the roots won't grow to absorb the carbon."
People needed to stop worrying about manicuring nature, she said.
"Nature is not symmetrical, and we are destroying our environment for the sake of suburban normality."
She had approached both police and the Dunedin City Council about the issue.
Police said it was not a criminal matter, and the council told her while it was a resident's responsibility to mow the berm outside their home, there was nothing stopping someone else maintaining it.
Yesterday, Haworth unveiled a mural outside her home in the hope of spreading the environmental message.
Banksy's Balloon Girl served as the inspiration for the mural but instead of a red balloon hers was green to represent "contained nature".
Council transport group manager Jeanine Benson said its policy stated the nearest property owner was responsible for maintaining the grass in front of their home, though the area was counted as a council road reserve.
"The council will maintain verges in special circumstances, for example if there are access or mobility issues involved."