Although South Africa is better known for its big reds, there is an impressive number of white wine varietals.  Here are some of them with some examples of good wines to try.     Chenin Blanc Originally regarded as relatively ordinary, it was historically grown with high yields and poor fruit concentration.  South Africa is now producing really good Chenin Blanc wines.  The wine it produces has fresh applies and citrus notes.  Over time the flavours develop rich honied flavours and the high acidity makes it a wine that can age for many years.  It is also known as Steen.  In Ireland we can find relatively easily Drostdy-hof and Fleur du Cap in a lot of stores. Chardonnay This grape flourishes in poor, rocky soils.  The wine expresses typical…