So general question here, tried Rolland's Clos de Los Siete last night and found it to be very acidic and bitter. I put this down to the soil since it is the only reasoning I can come up with. Any other ideas behind this? Thanks
Hard to know without tasting the wine, but I would inquire if is a more tannic or higher acid vintage than normal. Soil is a hugely important factor in wine quality, but rarely directly causative to individual factors.
This was from Mendoza so I was quite surprised by the acidity. Tannins were normal. Mendoza does not tend to produce high acidic wine. I imagine if they picked the grapes too early this could lead to higher acidity?
Almost anywhere can produce a high acid wine depending on the vintage and when they were picked—think Hunter Semillon—but generally Malbec even from high elevation wouldn't have what I would consider high acid.