The BBC reports local businessman Dean Beddis spotted the illegal plants among begonias and petunias.
“I had never seen cannabis growing in the wild before so it was crazy to see it,” Beddis told BBC.
“It’s actually rather a beautiful plant and stood out wonderfully. But they have gone now. I don’t know who took them.”
Council officers are now scouring CCTV footage and getting the police involved.
While councillor Rhys Hutchings saw an amusing side.
“It’s either kids or the Newport underworld community – I’m pretty sure it’s not Alan Titchmarsh,” he joked.
The Gwent Police admit they’ll struggle for a conviction now the plants are gone.
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Only in Newport could you find cannabis plants in the town centre. #new-potinbloom