 Like the Pinot grapes, the vine produces small, compact bunches that can be highly susceptible to botrytis bunch rot, particularly in wet climates.Chlorosis is another viticultural hazards that can impact Pineau d'Aunis, inhibiting photosynthesis and leaving the leaves of the grapevine prone to sunburn and browning.Wine writer Richard Kelley notes that Pineau d'Aunis is a "very "terroir"-sensitive" variety that will greatly reflect the vineyard soils and growing conditions that it experience.