"We need a legal supply. There are so many people telling their stories they need a regular, reliable, affordable supply."
She said attempts to legally bring cannabis back into New Zealand through a loophole was proving too difficult
Kelly said the treatment in Cuba for her terminal lung cancer was still in trial, and while not being sold as a cure has had positive trial results.
"For me it was after running out of options. But the results from the trials has made it something I want to give a go ... The results to date are promising and give some advantage to most [people]."
However, in yesterday's Facebook post she said the results so far weren't looking successful. She returns to New Zealand on the 19th.
Kelly has vowed to run a referendum in the 2017 general election on the legal status of cannabis.