Rioters used flowerpots stolen from a nursing home to attack police in north Belfast, the High Court has heard.
Prosecutors said that troublemakers threw anything that they could lay their hands on during an eight-hour onslaught following a republican parade last Sunday.
Details of the disorder were set out as bail was granted to a 17-year-old youth accused of injuring two police officers.
But the youth — who cannot be named — was given strict conditions, including electronic tagging and a ban from leaving his home during another potential flashpoint march later this month.
Police fear serious public disorder could break out at the Ulster Covenant commemoration event on September 29.
The teenage suspect faces charges of riotous assembly, assault occasioning actual bodily harm, assault on police and resisting arrest.
All of the alleged offences were committed on Sunday in the Carlisle Circus area.
Prosecution barrister Conor Maguire said that the trouble started when 300 loyalists protesting at the parade were moved back up Clifton Street.
During the subsequent disorder in nearby Denmark Street, dozens of petrol bombs, hundreds of firework bangers, bricks, breeze blocks and cobblestones were thrown at police.
“Flowerpots were stolen from a nearby nursing home,” Mr Maguire said.
“Police say anything that could be thrown at them was thrown at them,” he added.
Forty-seven officers were injured on Sunday night alone, three of whom were knocked unconscious and taken to hospital for treatment.
The 17-year-old was allegedly seen throwing masonry, wood and metal at police lines.
Mr Maguire said: “As a result of their involvement with this applicant, two police constables sustained injuries resulting in hospital treatment.”