A Devonport man will likely be ordered to undertake a community service order for trafficking in cannabis.
Joshua James Corbett, 37, pleaded guilty in the Supreme Court in Burnie on Tuesday to trafficking in a controlled substance, and four minor charges relating to possession and use of drugs.
Ms James said the mix of 21 mature and seedling plants were found in a "sophisticated... hydroponic grow room".
She said the operation including a range of heat lamps, pH monitoring devices and fans.
The court heard Tasmanian legislation provided that possession of more than 20 individual plants was regarded as a traffickable quantity.
In an interview with police he initially denied selling cannabis, but messages discovered on his telephone indicated he had indeed been selling "halves, bush bags, and bush sausages", Ms James said.
Ms James said Corbett had not wanted his mother to discover his operation, so he had attempted to grow enough cannabis at once for a long period of personal use.
She said he had grown cannabis for a number of years, but typically had seven or eight plants in his possession.
Defence lawyer Hannah Goss told the court Corbett lived in a flat at his mother's home, for whom he was a carer.
Corbett's father died in 2018 from a cerebral hemorrhage, Ms Goss said, a loss with which he was still coming to terms.
The court heard he had also not seen since his 13-year-old daughter, who lived with her mother, since Tasmania Police laid charges.
Justice Gregory Geason said that was "ridiculous" and that it "punishes the child".
"These proceedings have given him a huge shock," Ms Goss said.
"He is appalled that he has put his contact with his daughter in jeopardy."