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This is the latest Spring 2017 register of garden varieties of trees, shrubs, vines, and conifers registered by the Open Registration Of Cultivars (OROC aka O-Rock) project. It contains the newest woody plants introduced, patents, trademarked, or otherwise known to us from around the world, most dating from 2013 to 2017. Lacking an active, effective international process and accomplishment in cataloging new woody plants, the OROC program serves as the only active means of 100% free communication of these new landscape plants. In our role with the assistance of Cultivar.org, we continue to seek new ornamental plants and document their traits, history, and parentage.