Pigneguy said the letter from Auckland Transport was very threatening.
"It virtually tells us that we are public nuisances and, if we don't return this berm to a desert of grass in which no life can possibly exist, they will come out and do it themselves and it will cost $3450."
However, she's not going down without a fight. She says the berm is sustainable and environmentally friendly.
She used the berm to plant food she could provide to people who may have been struggling due to Covid-19.
In a statement, Auckland Transport said it has received a total of four complaints.
It said staff visited the site on June 23 and would look again to see if a compromise can be reached.
But Pigneguy says she's made multiple attempts to contact them with no results.
"I would've thought, if they had a problem with my berm, they would send someone out here to speak to me. They must have staff if they've got enough staff to keep hassling me."