news Police shut down major marijuana grow-op in Midland Officers located 10,000 growing cannabis plants,’ OPP officer says of Midland drug bust at vacant factory about 17 hours ago By: Andrew Philips 2 / 2 OPP officers are seen outside a vacant Midland factory. Andrew Philips/MidlandToday 1 / 2 An OPP cruiser is seen outside a vacant Midland factory that was home to a major grow-op. Andrew Philips/MidlandToday