How Long Does It Take to Make Kimchi?

Quick Answer

Making kimchi requires 1–2 hours of hands-on prep followed by 1–5 days of fermentation at room temperature. The total timeline from start to first taste is typically 2–6 days, though many people prefer kimchi that has fermented for weeks or months in the refrigerator.

Kimchi-Making Timeline

Stage	Time Required
Salting and brining cabbage	1–2 hours (or overnight)
Preparing paste and vegetables	30–45 minutes
Mixing and packing into jars	15–20 minutes
Room temperature fermentation	1–5 days
Refrigerator aging (optional)	1 week–6 months
Total to first taste	2–6 days

Understanding the Fermentation Timeline

Day 1: Initial Fermentation

After packing kimchi tightly into jars, lactobacillus bacteria begin converting sugars into lactic acid. At this stage the kimchi tastes fresh and mildly seasoned but hasn't developed its signature tang.

Days 2–3: Active Fermentation

Bubbles begin forming as carbon dioxide is released. The flavor turns pleasantly sour and the vegetables soften slightly. Many Koreans consider this the ideal stage for fresh (mat) kimchi. In warmer environments (75–80°F), this stage arrives faster.

Days 3–5: Full Fermentation

The sourness intensifies and the flavors deepen and become more complex. At this point, most people transfer the kimchi to the refrigerator to slow fermentation. Kimchi fermented at room temperature beyond 5 days can become overly sour.

Factors That Affect Fermentation Speed

Factor	Faster Fermentation	Slower Fermentation
Temperature	75–80°F (24–27°C)	60–65°F (15–18°C)
Salt amount	Less salt	More salt
Sugar/rice paste	More added	Less added
Cabbage cut size	Smaller pieces	Larger pieces
Jar packing	Tightly packed	Loosely packed

Temperature

Temperature is the most critical variable. At 75°F, kimchi can be ready in 1–2 days. At cooler temperatures around 60°F, it may take 4–5 days. Traditional Korean households used underground onggi pots to maintain a steady cool temperature for slow, even fermentation.

Salt Concentration

The standard ratio is about 2–3 tablespoons of coarse sea salt per pound of cabbage during the initial brine. Too little salt speeds fermentation but can produce off-flavors. Too much salt inhibits beneficial bacteria and slows the process.

Types of Kimchi and Their Timing

While napa cabbage (baechu) kimchi is the most common variety, other types have different timelines. Kkakdugi (cubed radish kimchi) ferments slightly faster due to smaller pieces. Mul-kimchi (water kimchi) can be ready in as little as 1–2 days because of its higher liquid content.

How to Know When Kimchi Is Ready

Taste your kimchi daily starting on day 1. It's ready when it reaches your preferred level of tanginess. The brine should taste pleasantly sour, the cabbage should be slightly softened but still have some crunch, and you should see small bubbles when you press down on the vegetables.

Storage and Aging

Once transferred to the refrigerator, kimchi continues to ferment very slowly and will keep for 3–6 months or longer. Many Korean cooks prize aged kimchi (mugeunji) that has fermented for over a year, using it in stews and fried rice where its intense flavor shines.