Eberhardt Blueberries This page first published: May 23, 2005 · Updated: Jun 18, 2018 · by CooksInfo. Copyright © 2021 · This post may contain affiliate links · This blog generates income via ads · Eberhardt Blueberries were developed by a Joseph Eberhardt in Olympia, Washington, USA for the Olympia Canning Company. During testing and development, the bush was referred to as “N51G.”