Gardaí made the find following a house fire.
€120,000 of suspected cannabis plants have been seized following a fire on the Offaly border.
Gardaí made the find after a house fire in the Rathnavogue area of Roscrea shortly after 7 o'clock yesterday morning.
Once extinguished, gardaí discovered the premises had been converted into a grow house - using a complex cultivation system of heat lamps, fans and a watering system.
The drugs are now being sent for analysis.
Anyone with information is asked to contact Nenagh Garda Station on 067 50 450, the Garda Confidential Line on 1800 666 111 or any garda station.