Pertaringa are fortuitously positioned at the foothills of Mount Lofty Ranges, the perfect location for grapes, by virtue of a temperate environment and deep clay loam soils. Undercover is a reference to the McLaren Vale tradition in supplying other regions with bespoke parcels of fruit, ultimately to be vinified into some of Australia's most favourite wines. Undercover is an old vine Shiraz, selected from Pertaringa's five decade old vineyard, hand crafted by winemaking supremos Geoff Hardy and Ben Riggs. Undercover is the essence of McLaren Vale Shiraz.

Pertaringa is surrounded by magnificent stands of native gum trees. All vines are pruned to control vigor and crop levels using a combination of regimens. In the summer the vines are topped and trimmed cutting the shoot tips off to encourage lateral growth and make the vines easier to access. Ironically, Pertaringa's Shiraz was initially sold off to Hardy Wines, proprietor Geoff Hardy's family company, to make port and to exchange for other wines as payment. Today Pertaringa's old Shiraz vines make the finest full bodied reds of the region and are highly sought by leading companies for their flagship wines. The most superior parcels of estate fruit are set aside for the Pertaringa label.