Vandals have caused thousands of pounds of damage by drilling into tree roots and pouring poison into the holes.
Police are appealing for information following the incident on Yewbarrow Road, Ulverston, which they say happened between July 1 and July 15 – causing £25,000 worth of damage.
“This is a shocking act of criminal damage, these trees will die in time due to the poison in the roots,” said PC Roy Williams, of the Ulverston & Lakes Neighbourhood Policing Team.
“We appeal for anyone with any information get in touch so we can make further enquiries and detect who is responsible for this crime.”
Anyone with information is asked to contact Cumbria Police on 101 and ask to speak to PC Williams.