Police in the Mekong Delta province of Ca Mau have seized 957 marijuana plants from a rented orchard.
The haul weighed in at over 1,158 kilograms
On Sunday, police said they are questioning the plants' apparent owner Nguyen Minh Canh, Tuoi Tre (Youth) newspaper reported.
The 47-year-old said he rented the land from a Lu Van Hoang. Further investigations would be underway, police said.
Planting marijuana or opium poppies carries a cash penalty in Vietnam, but repeated violations are punishable by up to seven years in jail, according to the Penal Code.