Browse resources Displaying 1 - 2 of 2 resources Credit: Miranda Ulmer (Cropped from original) How to spur prune grapevines This video provides instructions on how to prune cordon-trained vines with spur pruning during winter. Patricia A. Skinkis | Dec 2019 | Video Photo: Patty Skinkis (Cropped from original) How to renew a grapevine cordon This video describes how to renew a cordon in a mature, cordon-trained, spur-pruned vineyard that has not had regular cordon renewal. Patricia A. Skinkis | Aug 2019 | Video