The five trees destroyed by vandals on the Maria Carrillo High School campus in April were replaced last week by PG&E.
Two additional trees were damaged but are expected to survive.
"We had a planting party, if you will," said Principal Rand Van Dyke.
PG&E donated and planted five Eastern Redbud trees Friday in the quad where the other trees had been chopped down. The cost was approximately $1,000, according to PG&E spokeswoman Brittany McKannay.
PG&E crews also gave a quick tutorial on how to use the 811 phone information system to find out where it's safe to dig to avoid power and gas lines and where to locate trees so they don't interfere with lines, McKannay said.
Some students and parents were on hand to assist in the replacement.
Three teens — two from Maria Carrillo and one from Ridgway high schools — were arrested on suspicion of felony vandalism. The damage was discovered April 29.