The Warren Valley and Pemberton have much in common. Where they differ is primarily in soil type and climate and that after all is what regional identity is about.
Warren Valley is an undulating region which rises in altitude up to 300 m to the north of Manjimup. The principal type of soil is that which carried "marri" trees ("marri" soils). These soils are gravelly, lateritic sandy loams and gravelly loams. The gravel content is good for draining and soil-warming capabilities. Though slightly warmer then Pemberton, Warren Valley can nevertheless be termed a cool temperate region with more than two-thirds of its annual rainfall occurrring between May and September. Viticultural dangers occur largely from frost in the north of the region.
As with Pemberton it is too early to speculate about the major wine styles which will wventuate. As for whites, Chardonnay, Sauvignon Blanc and Verdelho seen adequately suited to the region.