Three men were found inside a "cannabis factory" with the pungent-smelling crop potentially worth up to £1.25 million.
Kreshnik Batusha, 22, Aurel Koltraka, 30, and Ledion Subashi, 27, all of no fixed address, pleaded guilty to producing cannabis when they appeared before Nottingham Crown Court.
Police had noticed cannabis odours in the area of Chapel Street, Kirkby-in-Ashfield, and found "a significant and sophisticated cannabis grow," said prosecutor Andrew Peet.
The property was protected by a CCTV system connected to a mobile phone.
Fans, ducting, sheeting were inside - the normal equipment one sees at grows of this type, added Mr Peet.
The cannabis was spread across 13 rooms of the property. Hundreds of the plants had been cropped and were drying.
He said this was "a massive seizure of 1,484 plants".
The projected yield was put somewhere been 41-and-a-half kilos and 124-and-a-half kilos.
Based on those yield ranges, if sold per gram, at deal value, it was worth between £400,000 and £1.25million.
The punitive value was put between a quarter-of-a-million and just short of three-quarters of a million.
Mr Peet said: "Each of these defendants is in the UK illegally."
Marie Spenwyn, representing Batusha and Koltraka, said: "A key feature for their basis of plea is that they were not in control of the production nor due to benefit entirely from the cannabis".
Caroline Harris, representing Subashi, said his primary motivation is to return to Albania as soon as possible.
The case was translated to the defendants by an Albanian interpreter.
Judge Stuart Rafferty QC jailed them for 14 months in prison each and said they remain in custody until they are deported,
He told them in the dock it was a cannabis factory generating vast sums of profit for those in charge, and the defendants were working as "gardeners" to the grow.
He said: "I have to impose proper sentences upon you regardless of the fact that you will be deported, so that people in your position will understand the court has a duty to punish those involved in offences like this. You could not complain if I began at the three-year maximum for this offence. But I do not".
