Gianpaolo Paglia, an agronomist born and bred in Maremma, and Justine Keeling, an English marketing manager, bought the estate in 1997. They started making Morellino di Scansano, with the existing 6 Ha of old and high quality producing vineyards, whilst at the same time planting new vineyards using local varieties such as Sangiovese and Alicante. These new vines were planted at a high density. They also built an modern winery and warehousing in 2002.

Poggio Argentiera is today composed of two estates situated in two different areas of Tuscany's Maremma, near the town of Grosseto. Podere Adua, with the head office, cellar and winery, is close to the Maremma Natural Park, in the coastal region of Grosseto. Podere Keeling is found in the hilly area to the North of the Scansano district, towards Monte Amiata. Although both are in the Morellino di Scansano DOC region, each experiences a very different micro-climate. Podere Adua is only a few kilometres from the sea, a few metres above sea level, where the coastal climatic conditions include hot temperatures, high insulation and little rainfall during the growing season. The soil is sandy-lime with little fibrous matter. Podere Keeling is in a hilly area 250m above sea-level, with a rich, fibrous clay soil, where the micro-climate is generally a little cooler.

Even though Poggio Argentiera is a young winery, it has already acquired an impressive record of awards and critical acclaim, both in Italy and worldwide,(three glasses from Gambero Rosso Slow Food Guide of Italian Wines, "Vini dell'Eccellenza" from the Espresso Guide of Italian wine, 90 points + scores both in the Wine Advocate and Wine Spectator).