Over the past two weeks we have had a couple really warm days, when the plants accumulated a lot of degree days, followed by a number of cooler days. Overall, since the last time I was out at West Madison Agricultural Research Station on April 11th, buds have gone from dormant to bud break. Some varieties are much further along than others; for example, La Crosse, Brianna and St. Croix are just beginning to break, while Frontenac in particular has begun to unfold the first leaves. Of the table grapes that I looked at, Einset is still tightly curled up while Somerset is beginning to unfurl.

The following photos were all taken on April 29th or 30th at West Madison Agricultural Research Station.

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This article was posted in Grapes, WFN, Vol. 1-4 and tagged Grapes, grapes developmental stages, Janet van Zoeren, table graps, wine grapes.