A garage boss told police officers that the cannabis he had grown in a flat was worth £12,000.
David Turner said he started using cannabis heavily after his father died and spent about £150 a week on the drug.
Turner, 23, of The Close, Kirkham, who runs a garage at Brock, pleaded guilty to cannabis production.
He was bailed for pre-sentence reports with all options including custody to be considered by Blackpool magistrates.
Don Green, prosecuting, said police went with Turner to a flat in Station Road, Wesham on May 9.
Twenty cannabis plants were found growing in the bedroom.
The prosecutor said: “He said the cannabis was for himself.
“He estimated the cannabis in the flat was worth £12,000.”
Peter Cave, defending, said his client, who had no previous convictions, had never fully recovered from his father’s death from cancer, which happened about three years ago.
Turner said he grew his own because buying cannabis was expensive and he did not want to fund dealers.
He had now greatly reduced his level of cannabis use with a view to stopping using it.