Police found a “large-scale cannabis farm” on Monday at Piltdown, near Uckfield.
A Sussex Police statement said officers followed a car and arrested two men for alleged cannabis production when they got out of the vehicle.
A total of 920 cannabis plants in containers were found inside a large warehouse at a small industrial estate at 2pm.
The men, one aged 21 from West Sussex, and the other aged 30 from Kent, have been questioned and released on bail until March 7.
Detective Sergeant Julie Dow said: “This was good work by officers who followed the vehicle and found this cannabis farm. The plants have a street value of £270,000 and we have made two arrests.”
Anyone with information about this large scale cannabis cultivation should contact Sussex Police on 101 quoting serial 0756 of 10/12.