Some time ago, I wrote a blog titled “Ungrafted Vines: A Taste of History”. It has since become the most read of all my blogs. Even now, 21 months later, several people every week hit on it. So, perhaps, it’s time to revisit a topic that’s clearly of interest to many of you.
Firstly, what do I mean by an ungrafted vine? It’s a vine where the whole plant – including the roots – is a single entity. You might think that all vines are like that, but most vines used for the wines we drink today are not – and we need to look back over a hundred years for the reason why.
In the 1860s, phylloxera, a microscopic bug that attacks vine roots and eventually kills the vine, was found in a vineyard in southern France. Over the following four decades or so, it spread quickly and devastated many vineyards in Europe and beyond. At the time, no-one knew what it was or how to deal with it. It was feared that the world’s entire wine industry would be wiped out. The cause of the problem was finally identified in the 1880s, but the solution took far longer to discover.
Phylloxera came to Europe from America where the native vine has developed resistance, but the European vine, which is genetically different, has not, so all our familiar varieties are vulnerable to attack. One solution considered was to plant American vines in place of European, but the wine they produced was not found to be of the same quality.
Fortunately, it was eventually realised that, by using the roots of an American vine and grafting (attaching) a European vine to them, you could have wines from Chardonnay, Cabernet Sauvignon, Merlot or whatever and protection from phylloxera. Problem solved!
So what about ungrafted vines? There are a few places in the world where you’ll still find them. They are either so remote from other vineyards that the bug has never spread there or the soil is very sandy (which the bug doesn’t like). Parts of Chile, a small area of Portugal and parts of Cyprus are among the places you’ll find that little bit of history – a vine that is a single entity from tip to root, but everywhere else, grafted vines are the only way to produce the wines we like.