Police say marijuana plants and other drugs were removed from a home in the city's Sherwood neighbourhood last November.
A suspect was arrested last week.
A second discovery was made in the Harvest Hills area two weeks ago and led to the arrest of a second man.
Police say electricity and water were being stolen in both cases to run the grow-ops.
Dennis Bassett, who is 36, and Fang Xie, who is 44, are facing trafficking and theft charges.