CCTV footage has been released after the offenders stole the trees on two separate occasions from a market in Chorlton.
The incident took place at around 9:40pm on Saturday 28 November, with police publishing the CCTV footage yesterday.
The offenders approached the Khawja Brothers Mini Market on Manchester Road before stealing a variety of trees. They returned once again by Monday 30 and stole more trees, before loading them into a van and fleeing.
Detective Constable Trudy Lindsey of South Manchester division said: “The shop owners were devastated to discover that 190 of their Christmas trees had been stolen. This is their livelihood and the offenders selfishly put their business in jeopardy.
“The van has been spotted in Chorlton since, offering people Christmas trees. If you are offered one to buy I would ask that you contact police immediately.
“If you recognise the men in the CCTV, please get in touch with us and help us to catch those responsible.”
Police are appealing for anyone with information to call them on 0161 856 4973 or the independent charity Crimestoppers, anonymously, on 0800 555 111.
WATCH: Humbug thieves steal 190 Christmas trees from Chorlton market