Sales of recreational marijuana to anyone over the age of 21 could begin on Dec. 1, months earlier than previously expected.

The change came when the Marijuana Regulatory Agency on Wednesday told medical marijuana businesses, including growers and processors, that they can transfer 50% of their inventory to the recreational market beginning on Dec. 1 as long as they’ve received a recreational license from the state.

To ensure that medical marijuana patients continue to have an adequate supply of product, dispensaries will be able to transfer only 50% of the inventory that has been sitting on their shelves for at least 30 days to the recreational side of the business.

That means that marijuana flower, which is the best-selling product at dispensaries and has been in limited supply for months, may not be available when a recreational marijuana retailer begins sales. Products that could be readily available include marijuana-infused edibles and lotions, vapes and other forms of marijuana concentrates.

The availability of recreational marijuana won’t be widespread and the inventory might be limited, said Andrew Brisbo, director of the agency.

“I can’t image that we’ll have more than a dozen or so” retailers licensed by Dec. 1, he said. [Read more a Detroit Free Press]