With all 68 producing members actively taking part, this cellar have the possibility to conserve more than 20,000 hectares of natural habitat. As part of their BWI membership, all producers of this cellar will be implementing the BWI's biodiversity guidelines, i.e. manage their natural areas according to these guidelines, as well as minimising their effect on the environment (effective waste management, energy saving, water saving, etc.) to ensure that the wine of this cellar is produced in a sustainable manner.

The  conservation areas  are mostly situated in the transitional area between the Worcester/Robertson Karoo and the Little Karoo. This region is a unique and exceptionally diverse part of the Succulent Karoo Biome, encompassing diverging landscapes, flora, fauna, climate, soils and geology. Several biomes (fynbos, succulent as well as renosterveld) come together and occur intertwined, mostly as mosaics in the Southern Karoo (SK) sub-region.

The presence of many mosaics between the bordering biomes, together with the scattered occurrence of 'heuweltjies' (also called 'termitaria' and which are a typical feature of the SK sub-region) throughout the area, result in the many unique and special habitat units creating a patchiness in the landscape. This region is rich in endemic species. An abundance of leaf succulents are found. The Southern Karoo sub-region has 23 endemic Aizoaceae genera. It is also an important area for endemism in other succulent groups e.g. Asphodelaceae, Euphorbiaceae and Apocynaceae.

Regarding the fauna of the area it is worth mentioning the following highlights:
The fauna of the SK sub-region has strong relationship with those of the both the fynbos and the desert. Amongst the endemic vertebrates, the reptiles are particularly well represented. Hymenoptera are prominent among the invertebrates. They have interrelationships with the flora, and their species richness parallels the vast array of flowering annuals. Ants, together with termites, are the most abundant animals resident in the SK sub-region and their numbers are only exceeded temporarily by episodes of population increases by other invertebrates. Harvester termites resident in 'heuweltjies' play an important role in the SK region in that they process the soil, making it fine-textured and alkaline and thus more fertile and with higher water content and water holding capacity than the surrounding soil.
The SK is particularly rich in scorpions, with a centre of endemism in the Worcester/Robertson Karoo

The Worcester /Robertson Karoo is also the richest in monkey beetles (Scarabaeidae, Rutelinae,) in addition to being a centre for fly speciation (Diptera)

A very positive find during the initial site visit to Pietersfontein of Mr. Kotie Kriel, was the the Breede Red fin (Pseudobarbus burgi);  quite a number of this species were found in the pristine upper reaches of the tributary of the Keisie River that flows through this property.

These farms form an area of high conservation value due to the many quartz areas and rocky outcrops, where many rare and localised succulent species usually occur.

The vastness of this conservation area lends itself to great variations in soil type (such as depth, moisture capacity, rockiness, mineral composition and acidity) and a great diversity of plant communities are still found on these farms.

With  little known about the biodiversity of the area, one of the future objectives of Montagu Cellar will be to document  the unique fauna and flora on these farms.