LANSING — The biggest marijuana grow operation in Michigan is putting on a full court press against unlicensed medical marijuana dispensaries and the caregivers who are supplying the market with weed.

Green Peaks Innovations, which has a large grow facility in Windsor Township near Lansing, had a press conference Tuesday, is planning a rally at the Capitol on Wednesday and placed a full-page ad in the Detroit Free Press, Detroit News and Lansing State Journal to press its case.

It wants unlicensed dispensaries shut down and the caregivers who have been supplying both licensed and unlicensed dispensaries with weed shut out of the market. The caregivers are the people who have been growing marijuana since voters legalized weed for medical use in 2008. They are allowed to grow up to 72 plants for five patients and have been selling their overages to dispensaries for several years now.

“Enough is enough,” said Green Peak Innovations CEO Jeff Radway. “Michigan’s patients deserve tested and safe cannabis.”

But while several state recalls have mostly come from caregiver products, there haven’t been any reports of adverse health effects from those products, said Andrew Brisbo, director of the Bureau of Marijuana Regulation.

The product also is OK with some consumers, said Jerry Millen, owner of the Greenhouse dispensary in Walled Lake. His customers have to acknowledge in writing that they will accept untested marijuana grown by caregivers.

“Not one has flinched. They’ve been using the product for years and they’ve never gotten sick from it,” he said.

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The state has been trying to shut down unlicensed dispensaries and curtail the caregiver products since September, but the Department of Licensing and Regulatory Affairs has been thwarted by lawsuits and judicial orders that have allowed the unlicensed retail shops and caregiver product to continue to operate.

That has left licensed dispensaries and growers to compete with shops and cultivators who haven’t had to pay hefty state and local fees and state regulatory assessments, as well as the high costs to test and transport the marijuana.

The dispensary owners, however, like the price and variety of caregiver product grown by people who have been in the marijuana business for a decade.

Licensed growers, meanwhile, have invested millions in their operations and have more expensive inventory that they’re trying to sell to dispensaries. The caregiver product, they say, is inferior and has often been recalled because of problems with pesticides and mold.

“The state mandated that we go through their rigorous and extensive licensing process,” Executive Vice President Joe Neller said. “We then hired over 170 people and built a fully operational 60,000-square-foot state-of-the-art headquarters facility in Windsor Township so our quality product could be grown in a clean, contaminant-free environment. Now, they are allowing untested product from caregivers to be sold to patients and that is totally unacceptable.”

The situation may be resolved by the end of the week, at least when it comes to unlicensed dispensaries. Court of Claims Judge Stephen Borrello, who has allowed the dispensaries to stay open, is expected to make yet another ruling on them by Friday. And the state House of Representatives passed a bill last week, on a vote of 102-4, to require unlicensed dispensaries to shut down by June 1. That bill is expected to get a hearing soon in the state Senate.

Kathleen Gray covers the marijuana industry for the Detroit Free Press. Contact her: 313-223-4430, kgray99@freepress.com or on Twitter @michpoligal.