The Nebraska Statewide Arboretum (NSA) will hold a plant sale at the Douglas-Sarpy Extension Office in Omaha (8015 W. Center Rd.) on Saturday, May 13, from 9 a.m. to 12 noon. The sale, which will feature Nebraska native plants, trees and shrubs, is open to the public. NSA members are encouraged to use their 15% member discount on plant purchases.