Korean Home Fermentation

My neighbor across the hall keeps 3 clay onggi pots on a shelf in her kitchen for fermenting kimchi, doenjang, and gochujang. When she opens the lids, the smell is sharp and deep in a way store-bought versions never match. Onggi pots are unglazed earthenware that breathe through microscopic pores in the clay, allowing air exchange during fermentation while keeping contaminants out. This material property is why Korean fermentation traditions developed around these specific vessels rather than glass jars or metal containers. She learned the process from her grandmother and adjusts salt ratios by taste rather than measurement, adding more napa cabbage or red pepper flakes until the batch smells right. Watching her work is like watching someone navigate by instinct rather than instruction. Kimchi takes about 5 days at room temperature before she moves it to the fridge. By that point, lactic acid bacteria have produced enough tang to balance the garlic and ginger. I tried making a batch in a mason jar using a YouTube recipe. It came out fine but flat, missing the depth that develops in a clay pot over weeks. The difference convinced me the vessel is as important as the ingredients. Our shared wall means I can sometimes smell her ferments through the heating vent. I don't mind. The whole process connects her to a food tradition thousands of years old, and doing it in a college apartment with grocery store vegetables makes it feel portable rather than precious.