A legal weed firm has 20 large greenhouses full of the plants just minutes from the Duke and Duchess of Sussex’s mansion in California.
And following a string of complaints from neighbours, the company has vowed to install new “odour control systems”.
One local told the Sunday Mirror the smell is so bad he had to pull over while driving.
The factory is less than a 10-minute drive from the Montecito mansion where the couple live with son Archie, two, and two month-old daughter Lilibet.
Local Gregory Gandrud, 60, said of the new anti-smell measures: “This is good news for us, and Harry and Meghan.
“The stink was getting stronger and heading their way.
I was driving along the freeway and was hit hard by the smell. I had to pull over.
It made me completely lose my train of thought. “Lots of people here are suffering.”
Richard Mineards, another neighbour, added: “Growing cannabis near here became legal in 2016 and lots of growers jumped on the bandwagon.”