Latest time to prune this year?

Asked April 12, 2018, 8:23 AM EDT

Greetings. Should all my vines be pruned by now given the continuing cold temps? Also. I've chosen what I guess is called bilateral spur pruning. Is there an ideal pruning method for the Frontenac grape or is it dependent on factors specific to each vineyard? Thanks in advance. Chris Sheehan

Hennepin County Minnesota pruning grapevines horticulture

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