A marijuana firm in Massachusetts was temporarily shut down by state health officials for spraying plants with harmful pesticides, according to a report.

In a buzz-killing move, the company Triple M — which cultivates medical weed near Plymouth — used unapproved chemicals that could sicken smokers, Department of Public Health officials told the Boston Globe.

The firm was forced to stop selling weed at nearby dispensaries Thursday because it “could pose an immediate or serious threat to the public’s health, safety or welfare,” DPH officials said, according to the paper.

Triple M was slapped with a “cease-and-desist and quarantine” and forced to “suspend the sale of all medical marijuana products” while officials investigate, a spokeswoman said.

But the company fired back, claiming it used a natural pesticide derived from chrysanthemum flowers that’s been approved for use in other weed-legal states.

“The natural pesticides that Triple M used have been approved in all 50 States for growing produce as well as for use on cannabis in Washington, Oregon, Nevada, Colorado, Illinois, and Ohio,” the firm said in a statement.

“Triple M only used the pesticides during the early stages of cultivation, never on the flower buds and ceased using the pesticides on plants in September 2018,” the firm said.

Triple M is the second medical marijuana company to be closed down over pesticides in Massachusetts. In September, Good Chemistry in Bellingham was shuttered.