Mushroom growth is just the latest in a series of revelations about the state of Fortrose Academy’s older buildings.
In January, the Press and Journal revealed that angry parents had demanded action over “crumbling plaster and brickwork, persistent damp and black mould”.
Local MSP Kate Forbes then raised concerns that some female pupils at the Black Isle school were refusing to use the showers due to “awful” damp and mould.
Later that month, councillors agreed to divert cash for “immediate” investment at Fortrose to tackle some of the problems.
Then last month the P&J reported that parents had spent £15,000 last year to buy textbooks and basic equipment for pupils at Fortrose, including essentials such as safety goggles, power cables, drug awareness kits, and art easels.
A £5.4million extension opened at Fortrose in 2002, but some blocks have changed little since they were built in the 1960s.
The refurbishment and replacement of the older blocks was listed by the council among its “highest priority” projects last year.