Nova Scotia's finance minister says she will be firing off another letter to Health Canada to register the province's concerns over a growing shortage of cannabis.

Karen Casey says Nova Scotia is getting only 35 to 40 per cent of the cannabis it needs to meet demand at government-run outlets and she wants to make that clear to the federal regulator after two previous letters.

Casey says one producer in Nova Scotia has been approved by Ottawa and two more are ready to go, so she's encouraging Health Canada to give them the approval they need.

She says there has been no need yet to close any of the 12 shops run by the Nova Scotia Liquor Corporation because of product shortages, but the situation is being monitored.

Spokesperson Beverley Ware says the liquor corporation is being affected by shortages that have hit provinces across the country.

Ware says the corporation's supply comes from 16 licensed producers based in Nova Scotia, P.E.I., New Brunswick, Ontario and Alberta.