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Writer

Onno Deumer

Onno discovered his love for wine a decade ago while living in South Africa, drawn to the landscapes and vineyard culture. Today, he writes about wine, leads tastings as founder of Wijngilde Gooi en Vechtstreek, and actively shares insights on Vivino. He holds SDEN 3 certification and is currently pursuing WSET Level 3.

His passion lies with terroirdriven wines: lower in alcohol, high in acidity, and shaped by vineyard work - not cellar tricks. Think energy, precision, and purity over ripeness and volume.

Professionally, Onno brings commercial leadership to the FMCG and ecommerce space, blending business sense with a deep appreciation for wine craft.

The Cape’s Dual Grammar of Winemaking.
8 February 2026

The Cape’s Dual Grammar of Winemaking

In this in-depth exploration of South African wine, Avondale and Jordan reveal how the Cape’s future is being shaped by two contrasting yet complementary philosophies, balancing biodynamic farming, precision viticulture and an evolving understanding of terroir. Set against climate pressure and shifting ripening patterns, their stories show how innovation and classical structure are redefining Stellenbosch and the wider Cape wine identity.

Onno Deumer

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