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Re:Show HN: Growing Wine Grapes in My Parents' Basement by pvaldes on Friday October 02, 2020 @09:39PM (#24668784)
That would became a serious risk of Philoxera, as those are stems rooted, therefore not grafted.
Re:Show HN: Growing Wine Grapes in My Parents' Basement by 082349872349872 on Saturday October 03, 2020 @02:22AM (#24670023)
I doubt it's in the european context, as it seems unlikely these would qualify for AOC/DOC/AOP.

https://www.inao.gouv.fr/content/download/1840/18727/version... (VI - Conduite du vignoble / 2° - Autres pratiques culturales) contains:

> "Toute modification substantielle de la morphologie, du sous-sol, de la couche arable ou des éléments permettant de garantir l’intégrité et la pérennité des sols d’une parcelle destinée à la production de l'appellation d'origine contrôlée est interdite, à l’exclusion des travaux de défonçage classique."

which suggests hydroponics would not be kosher, being modification of the arable layer.

Indeed, looking at the local AOC cahier, within each commune we only allow production from certain parcels.

(We have a lot of hobby vignerons, the smallest registered vineyard here being only 0,16 ha, so I doubt grapes are a bottleneck.)