Police found 98 plants in the two storey home on Dagmar Berne Street in Macgregor when they raided the property in November 2012.

The cannabis was grown using an expansive hydroponic system spread through most of the rooms..

The power had been diverted, holes punched in the walls, ventilation pipes and carbon filters installed, and electrical cables ran through the home.

Crown prosecutor Anthony Williamson said on Wednesday the house had been "consumed" by the cannabis crop, save for the kitchen and lounge room.

The prosecution estimates that, once mature, the crop would have sold for just under $500,000.

Mohanad Quzag, 23, and Rene Kremisis, 21, were due to go on trial in the ACT Supreme Court on Wednesday.

But Quzag pleaded guilty to cultivating the crop just before his trial, leaving Kremisis to fight the charges on her own. Two others have already been sentenced for their role.

Kremisis used to live in the Macgregor home with her family, but her mother and father separated, and she moved out with her mother, the court heard.

Her parents continued to own the home.

The prosecution alleges that between September and November 2012, Kremisis helped cultivate the crop.

The young woman, it is alleged, only had a minor role in the cultivation, and was allegedly not as "hands-on" as others.

But the accused, represented by Craig Lynch, has denied the charge, and the court heard neither her DNA nor fingerprints were found on seized items associated with the hydroponic set-up.

Police had installed a visual surveillance device in the kitchen of the home, and Kremisis is shown inside the house during what the prosecution described as the operation in "full swing".

The Crown alleges she spent significant times in parts of the house where there would have been nothing else to do but tend to the crop.

One detective gave evidence that, when confronted about why she was at the house, she told police she was moving things out and asked if they had caught the people who had put the hydroponic system in her house.

Mr Lynch accused the detective of being mistaken about who had said that to police.

The defendant's mother also gave evidence, saying she was "devastated" to learn her former home was being used to grow cannabis.

"I lost my house, I'd lost everything in my life," she said.

She said her daughter never spoke of the crop to her.

The Crown has closed its case and closing submissions in the trial are expected to take place on Thursday morning.

The judge alone trial continues before Chief Justice Helen Murrell.