Wine Spectator
WS Video on Twitter WS on Facebook

When is a Grape Ripe? Ripeness, Phenols & Acid Perception (2:43)

Ripeness and physiological maturity, phenolics and acidity are just a few of the concepts covered as Clemens Lageder and Jo Pfisterer join Alison Napjus. (Yes, it's a nerdy topic, but these factors have a lively impact on the wine in your glass.)

Don't miss a single video. Sign up for our free e-mail newsletter.

For videos with closed captions, please see the Wine Spectator video page on YouTube.