two, two-part classes from the Colorado State University Extension Office on new methods for planting trees and the world of insects and diseases trees and bushes face. One class will be held Tues., March 26 from 2-4 p.m. at the CSU Extension Office, 305 S. Union Blvd. and repeated Thurs., March 28 from 6:30-8:30 p.m. at the El Paso County Citizen's Service Center, 1675 W. Garden of the Gods Road.