About 40 dope smokers lit up doobies and cones at Yatton Park on Saturday afternoon as part of J Day.
Organisers and supporters describe J Day as an international day celebrating cannabis culture and protesting against the failed war on drugs.
A 23-year-old Tauranga woman at the event said she started smoking the drug at the age of 18 after a lifetime of chronic illness.
"I have lupus, which is the deterioration of the bone and muscle. It's basically attacking my body from the inside out."
She was born with the disease, which usually only affected people from the age of 30, she said.