NIPSCO is offering a limited number of free trees to NIPSCO electric customers through Energy-Saving Trees, an Arbor Day Foundation program that helps conserve energy and reduce energy bills through strategic tree planting. Participants will receive the trees at an ideal time for planting along with information on how to plant them in the most strategic location near their homes or businesses. NIPSCO electric customers can reserve their trees at . Requests will be fulfilled on a first-come, first-served basis. Before starting any digging projects, NIPSCO reminds customers to always remember to call 811, the free national safe digging hotline, to have their underground utility lines marked. Online requests can be made at .