Disability support pensioner Dale Andrew Henry, 40, appeared unrepresented in Launceston Magistrates Court on Friday.

Police prosecutor Senior Constable Ashlee Goss told the court that in September last year, Henry cast a fishing rod into the window of TSG - a tobacconist on Macquarie Street in George Town.

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When the glass failed to break he cast the fishing rod into the window again and the glass shattered.

Henry kicked it and left the scene.

The incident was captured on CCTV and when police went to Henry's home they found him in the same clothes he had on when TSG was targeted.

Senior Constable Goss said police found cannabis seeds inside a muffin tin at Henry's home, along with what was believed to be a home-made bong on the coffee table. Cannabis bud and a metal smoking pipe were also found.

Prior to the fishing rod incident, the court heard Henry tried to break into a Caltex store at George Town.

After he smashed a window, Henry put his hand through it and cut himself. Police tested blood found at the scene and identified Henry as the culprit.

In court it also emerged Henry was also caught trespassing and attempting to remove plants from a community garden in George Town.

Henry pleaded guilty to lone counts of burglary, property destruction and trespassing. He also pleaded guilty to four minor drug offence charges.

Magistrate Sharon Cure revealed Henry's actions meant he had breached a suspended sentence he was given in May last year.

"You're facing a jail term," she told Henry, who said he forgot he'd been given the suspended sentence.

Magistrate Cure told Henry to see a forensic mental health officer and a probation officer before she sentences him on March 11 at 2.15pm.