David Madden, 20, of 88 Ballinderry Park, Mayfield, Cork, denied having anything to do with the petrol-bombing during a trial at Cork District Court, but he was convicted of the crime.
Sentencing had been adjourned a number of times so that the probation service could report on him.
Judge Olann Kelleher said: “I see the recommendations of the probation service. I think they are being very kind to him.”
Defence solicitor Eddie Burke said: “He has a lot of difficulties, He is quite a vulnerable young man.”
Judge Kelleher said: “I will put him on a probation bond for 12 months but there are conditions and if he misses one of them I will impose a custodial sentence.”
Mr Burke said Madden was hoping to get into a residential treatment programme for his drug problem within five weeks.
The judge wanted a progress report on Madden in three months.
Judge Kelleher last year convicted Madden on a charge of possession of the petrol-bomb with intent to damage the house at Springville, Old Youghal Road, Cork.
Julianne Gibson who lives with her partner, Patrick Heaphy, and their eight children, said the petrol bomb was thrown at the front door on the night of May 7, 2012.
Judge Olann Kelleher was told the house had been the subject of attacks in the past by people other than the accused before the court.