Lightning in the Cold
Aleš Kovář is a part-time vigneron who, between shifts at a water treatment facility in the Brno suburb of Rajhrad, tends half a hectare of fifty-year-old vineyards in Tasovice nad Dyjí, on the granite slopes of the Znojmo wine sub-region. A lifelong friend of neighbouring virtuoso Martin Vajčner and part of a tight-knit circle that includes Michal Lacina and Jakub Novák, Aleš has become one of Moravia's most exciting zero-zero voices — not through scale or spectacle, but through extreme patience. His 2021 vintage was his first produced entirely without sulfites, after two, and in some cases three, cold winters of élevage. The wines — brief skin-macerated whites and pét-nats from Riesling, Müller-Thurgau, Grüner Veltliner, and Welschriesling — are finely etched, full of light, and alive with the mineral crackle of granite and the clarity of long, cold ageing. This is natural wine as a second life, squeezed into weekends and evenings, made with humility and given time.
Aleš Kovář & the Water Treatment Poet
The story of Aleš Kovář is a story of parallel lives — of a man who treats water by day and makes wine by night, and who has found, in the old granite vineyards of Tasovice nad Dyjí, a terroir that demands nothing but patience. Originally from the Moravian border town of Znojmo, Aleš now lives in Rajhrad, a suburb of Brno, where he works for a water treatment facility. In his spare time — which is to say, every spare hour — he farms roughly half a hectare of rented vineyards in the vicinity of Tasovice, on the granite bedrock that defines the Znojmo wine sub-region. The vines are approximately fifty years old, traditional varieties planted long before the natural wine movement reached Moravia, and Aleš has rented them for the long term, committed to their preservation and their slow, honest expression.
Aleš is a lifelong friend of Martin Vajčner, the virtuoso vigneron whose zero-zero wines from the same Znojmo terroir have already achieved cult status, and he moves in the same tight circle as Michal Lacina and the reclusive Jakub Novák, a disciple of the late Petr Nejedlík of Dobrà Vinice. It was in this company — at tastings, in cellars, and at the Natural Wine Fest in Brno — that Aleš refined his philosophy. He is reflective by nature, with a well-deserved reputation for patience, and his winemaking is guided by a single, unyielding rule: nepřidávat a nebrat — add nothing, take nothing. No artificial additives. No filtration. No clarification. And since the 2021 vintage, no sulfites at any stage.
The road to total zero-zero was gradual. Previous vintages saw minimal additions of 5–10 mg/L of sulfur before bottling — a concession to caution that Aleš finally abandoned in 2021. That vintage, bottled in the spring after two or three cold winters of élevage, marked his arrival as one of Moravia's most uncompromising natural winemakers. The wines are not rushed; they are given enough time before they go into the bottle, and then they mature further in bottle. The result is a tiny portfolio — whites, orange-tinged skin-macerated wines, and a whisper of pét-nat — that captures the specific energy of Znojmo granite and the clarity that only long, cold ageing can provide. Aleš does not make wine to pay the bills; he makes it because the vineyards, the friends, and the granite demand it.
"In the cellar, he follows the principle of adding nothing to the wine and taking nothing from the wine. After the harvest, the wine is given enough time before it goes into the bottle."
— Aleš Kovář
Tasovice nad Dyjí & the Granite Slope
Tasovice nad Dyjí sits in the Znojmo wine sub-region of Moravia, in the southeastern corner of the Czech Republic, hard against the Austrian border and the meandering course of the Dyje River (Thaya). It is a landscape of rolling hills, forested margins, and ancient vineyard slopes that descend toward the river valley — a terroir defined not by fame but by geology. The vineyards Aleš tends are planted on a granite bedrock, on mild slopes that fall toward the Dyje, a combination that creates free-draining, mineral-rich soils and a distinct coolness that preserves acidity even in warm vintages. This is not the loess and limestone of southern Moravia; it is harder, stonier, and more demanding, and the wines that emerge from it carry a corresponding mineral crackle and electric tension.
The vineyards are approximately fifty years old — traditional plantings that have survived the decades of communist-era cooperatives and the subsequent rush to international varieties and industrial viticulture. Aleš rents these plots for the long term, farming them with maximum humility toward nature. There are no systemic sprays, no chemical fertilisers, and no mechanised shortcuts on half a hectare of old, bush-trained vines. The work is manual, painstaking, and carried out in the hours before and after his shifts in Brno. The granite subsoil, combined with the vineyard's location and the gentle slope that channels cool air from the river, creates a microclimate that is ideal for white varieties: slow ripening, high acidity, and a mineral backbone that does not need oak or sulfur to assert itself.
The climate is continental, with hard winters that are the secret weapon of Aleš's cellar. The cold winters of Moravia — real, bone-chilling winters that last for months — provide a natural clarity that warmer regions struggle to replicate. Natural clarification during a cold élevage encourages an enchanting clarity of expression in the finished wine, and the long, slow ageing that Aleš practises is possible only because his cellar, like those of the Jura or the Haute-Loire, experiences genuine cold during fermentation and élevage. The result is a texture that Ayscough describes as incisiveness — a finely etched, lightning-bolt quality that defines every wine in the portfolio. The granite, the river, the slope, and the cold: these are the four elements of Aleš Kovář's terroir, and he interferes with none of them.
The varieties are a focused quintet of Central European white classics, all suited to the cool, mineral Znojmo climate. Riesling — the great aromatic grape of the north — thrives on the granite, producing wines of piercing acidity and floral complexity. Grüner Veltliner — the signature variety of Austria, just across the border — finds a Moravian home here, yielding wines of white pepper, green apple, and stony intensity. Müller-Thurgau — often maligned, but capable of crystalline beauty when grown on poor granite and handled with patience — provides the base for some of Aleš's most elegant cuvées. Welschriesling (Ryzlink Vlašský) — the workhorse of Central Europe, but here given dignity through old vines and long ageing — contributes a distinct, savoury profile. And Neuburger — an Austrian heirloom variety rarely seen outside its homeland — adds a nutty, floral dimension to the pét-nats. The goal is not varietal showcase but terroir expression: to let the Znojmo granite speak through whichever variety happens to be planted on it.
Aleš Kovář's vineyards are located in the vicinity of Tasovice nad Dyjí, in the Znojmo wine sub-region of Moravia, Czech Republic. The estate comprises roughly 0.5 hectares of rented, fifty-year-old vineyards planted on granite bedrock on mild slopes descending toward the Dyje River. Founded around 2018; first totally unsulfited vintage 2021. Part-time vigneron; full-time water treatment worker in Rajhrad, Brno. Long-term rental of old vineyards. Friend and collaborator in the circle of Martin Vajčner, Michal Lacina, and Jakub Novák.
The vineyards sit on granite bedrock with mild slopes falling toward the Dyje River — free-draining, mineral-rich, and naturally cool. The granite imparts a distinct mineral crackle and electric tension to the wines. The river-influenced microclimate moderates summer heat and preserves acidity. The old vines — approximately fifty years of age — are bush-trained and farmed entirely by hand on half a hectare. No mechanisation. No irrigation. The terroir is defined by stone, slope, and the cold breath of the river.
Everything in the vineyard is done with maximum humility toward nature. No systemic sprays, no chemical fertilisers, no herbicides. The work is manual and carried out part-time. The continental climate provides hard, genuine winters that last for months — the secret weapon of the cellar. Natural clarification during cold élevage produces an enchanting clarity of expression. The long, slow ageing is possible only because the cellar experiences real cold, allowing the wines to develop incisive, finely etched textures without sulfur or filtration.
Aleš is part of a tight-knit circle of Znojmo natural winemakers: Martin Vajčner (neighbouring virtuoso), Michal Lacina, and Jakub Novák (disciple of the late Petr Nejedlík of Dobrà Vinice, who first put Znojmo's sandy granite terroirs on the map). The cellar is a small rented space near Jakub Novák's. This is not a solitary project but a collective conversation — a group of friends proving that the Znojmo granite, when handled with zero artifice and infinite patience, can produce wines of startling clarity and mountain energy.
Add Nothing, Take Nothing & the Long Cold Wait
The guiding philosophy of Aleš Kovář is expressed in four Czech words that hang over every decision in the cellar: nepřidávat a nebrat — add nothing, take nothing. This is not a slogan; it is a methodology. Aleš does not add cultured yeasts, enzymes, tannins, or sugar. He does not filter. He does not clarify. And since the 2021 vintage, he does not add sulfites at any stage — not at harvest, not during fermentation, not at bottling. The result is wine that is nothing more than the transparent transformation of grape into liquid, with the granite terroir and the cold winter as the only shaping forces.
The methodology is deliberately patient and rigorously simple. Harvest is entirely manual, carried out in the early mornings or late evenings around Aleš's work schedule, and the grapes are transported in small containers to a small rented cellar in Tasovice, near that of his friend Jakub Novák. Every white variety — Riesling, Grüner Veltliner, Müller-Thurgau, Welschriesling — receives a brief maceration on the skins after picking. This is not orange-wine extremism; it is a gentle, purposeful extraction of phenolic texture and aromatic depth, a few hours or days that transform the juice from simple white to something more complex, more savoury, more true to the granite. Fermentation is spontaneous, initiated by the indigenous yeasts that live on the grape skins and in the cold cellar air.
After fermentation, the wines are aged for at least one year in wooden barrels, on the yeast lees, with no racking or intervention. This is where the cold Moravian winter becomes a co-winemaker: the low temperatures encourage natural clarification, slow oxidation, and the development of a texture that Ayscough describes as little lightning bolts — finely-etched and full of light. The 2021 vintage was aged for two, and in some cases three, cold winters before bottling — an eternity in a world where most white wines are bottled within six months. But Aleš is not in a hurry. The wines are given enough time before they go into the bottle, and then they mature for some more time in bottles before release. This is not negligence; it is the conviction that granite-grown whites, when handled without sulfur, need time to find their equilibrium.
The pét-nats are made with the same patience and the same zero-addition rigour. The Živíjo — from Riesling — and the Happy Cat-Nat — from Müller-Thurgau and Neuburger — are bottled during fermentation with no added sugar, no added yeast, and no dosage. They are disgorged or released as they are, with the natural sediment of the ancestral method, and they capture the same lightning-bolt energy as the still wines, but in effervescent form. The cellar is not a factory; it is a small, cold, patient space where time, granite, and wild yeast do the work, and Aleš provides the humility.
Brief Skin Maceration, Indigenous Yeasts & the Cold-Winters Élevage
The guiding principle of Aleš Kovář's winemaking is that the cellar should be invisible and the winter should be the clarifier. Their approach — hand harvest from fifty-year-old vines on granite bedrock, brief skin maceration for all white varieties, spontaneous fermentation with indigenous yeasts, ageing for at least one year in wooden barrels on the lees, extended élevage through two or three cold Moravian winters, zero added sulfites, no filtration, no clarification, and bottling with natural sediment intact — is not a rejection of modernity but a deeper application of patience. The brief skin contact provides texture and phenolic depth without masking the variety. The indigenous yeasts provide fermentation with a microbiological fingerprint unique to the Znojmo cellar. The long, cold barrel ageing allows natural clarification and the development of a finely etched, incisive texture. And the absence of sulfur ensures that the wine ages honestly, developing the mineral, spicy, floral complexity that only zero-addition, cold-climate winemaking can achieve. The cellar is not a laboratory; it is a water-worker's second home, where weekends, evenings, and long winters do the work that chemicals and machines cannot.
Živíjo, Happy Cat-Nat & the Granite Lightning
Aleš Kovář produces a minuscule, highly focused portfolio from roughly half a hectare of fifty-year-old vineyards in Tasovice nad Dyjí. The wines are divided by method — pét-nats that capture the effervescent joy of Riesling and Müller-Thurgau in ancestral form; and still whites that undergo brief skin maceration and long barrel ageing to achieve a texture and clarity unique in Moravian natural wine. All are united by a common methodology: spontaneous fermentation with indigenous yeasts, brief skin contact, at least one year in wooden barrels on the lees, extended ageing through cold winters, zero added sulfites, no filtration, and no clarification. The names are personal and playful: Živíjo — a Czech toast to life, given to the Riesling pét-nat; Happy Cat-Nat — a wink at the joy of bubbles, from Müller-Thurgau and Neuburger. The still wines carry the names of their varieties, honest and unadorned, because Aleš believes the grape and the granite should speak louder than the label. The portfolio spans sparkling, white, and orange-tinged — all united by a common character of raw authenticity, granite minerality, electric acidity, and the unmistakable signature of a man who has waited through three winters for a wine to find its voice.
"In the cellar, he follows the principle of adding nothing to the wine and taking nothing from the wine. After the harvest, the wine is given enough time before it goes into the bottle."
— Aleš Kovář
The Waterworker's Second Life
To understand Aleš Kovář, one must understand that he is not merely a winemaker; he is a water treatment worker who happens to make wine, a part-time vigneron who happens to produce some of Moravia's most incisive zero-zero whites, and a friend who happens to be part of a circle that is redefining the Znojmo terroir. Aleš is not an entrepreneur seeking expansion; he is a man who tends half a hectare because that is what his time allows, and who makes wine with the same precision he brings to water treatment — clean, patient, and essential. The identity of the project is defined by this doubleness: the Brno suburb and the Tasovice vineyard; the water facility and the rented cellar; the work week and the harvest weekend. The wine is made in the margins of a working life, and it carries the humility of that origin.
The identity is also defined by absence — the absence of sulfites, the absence of filtration, the absence of clarification, the absence of chemical sprays, the absence of a winery of his own, and the absence of hurry. These absences are not lacks; they are choices. Aleš does not filter because he believes the wine is complete as it is. He does not sulfite because he believes the vineyard and the cellar are clean enough to protect themselves. He does not own a winery because he believes the wine belongs to the terroir, not to a building. And he does not rush because he believes that granite-grown whites, when handled without sulfur, need time to find their equilibrium. The result is a portfolio of wines that are deliberately alive, deliberately specific to the half-hectare around Tasovice nad Dyjí, and deliberately challenging to the industrial norms of Moravian wine. They are not made to please a tasting panel; they are made to please the friends who drink them, the granite that shaped them, and the cold winters that clarified them.
The future of Aleš Kovář is tied to the continued health of his half-hectare, the deepening of his zero-zero commitment, and the gradual expansion of his patience. He is eager to go further — to experiment with longer élevage, to explore the forgotten varieties that still survive in the old vineyards, and to obtain more natural expressions from the fruit of his granite slopes. The Živíjo line will continue to be the Riesling pét-nat, the toast to life. The Happy Cat-Nat will continue to explore the playful side of Müller-Thurgau and Neuburger. The still wines will continue to evolve through cold winters, each vintage different from the last — fuller in 2018, balanced in 2019, lightning-bolt acidic in 2021. And Aleš will continue to work his shifts in Brno, to drive to Tasovice in the evenings, and to prove that a part-time vigneron, with half a hectare and infinite patience, can produce wines as honest as the water he treats.
In an age of increasing industrialisation in wine — of global varieties, engineered yeasts, and corporate consolidation — Aleš Kovář stands as a compelling alternative, not because he rejects modernity but because he has embraced a deeper modernity: one that values a half-hectare of rented old vines over a boardroom of consultants, fifty-year-old granite vineyards over new plantings, hand harvest in spare hours over machine picking, brief skin maceration over sterile juice, indigenous yeasts over inoculation, zero sulfites over standardised stability, no filtration over cosmetic clarity, one year in barrel on lees over six months in tank, three cold winters over summer bottling, the water treatment worker's patience over the marketing budget, and the specific voice of Znojmo's granite slopes over the standardised replication of a global style. Aleš Kovář is not merely making wine; he is proving that a part-time vigneron can become a zero-zero virtuoso, that a rented vineyard can become a living cellar, that a wine with no additives can possess the most profound identity, and that the simplest philosophy — add nothing, take nothing — is often the most profound. From the first experimental vintages around 2018 to the 2021 zero-zero release after three cold winters: all united in one bottle, one water-worker's second life, one unanswerable argument for the possibility of authentic, natural, zero-sulfite, hand-made, passionately honest wine from the granite heart of Znojmo.
Aleš Kovář — water treatment worker by day, vigneron by night and weekend. He lives in Rajhrad, a Brno suburb, and farms roughly half a hectare of rented, fifty-year-old vineyards in Tasovice nad Dyjí on the granite slopes of Znojmo. A true part-time project where technical precision and manual labour intersect. The cellar is a small rented space near that of his friend Jakub Novák. This is a winery where the personal and the professional are inseparable, and the wine carries the quiet signature of a man who has surrendered to the granite rather than conquering it.
Five absolute prohibitions: no added sulfites (since 2021; previously <10 mg/L), no filtration, no clarification, no chemical pesticides, no chemical herbicides. Brief skin maceration for all white varieties. Indigenous yeasts only. Hand harvest in small boxes from fifty-year-old vines. Ageing for at least one year in wooden barrels on the lees, followed by extended bottle ageing through two or three cold Moravian winters. The wines are as natural as they come — spontaneously fermented, unfiltered, unfined, and purely expressive of the Znojmo granite. A proof that the longest wait often produces the purest lightning.

