Bokashi: what it is, and how it differs from compost

Living soil · Updated 15 October 2026 · 3 minute read

Do you throw out cooked leftovers, meat scraps and dairy because your compost pile cannot take them? Or have you got no room for a pile at all, and wondered whether that sealed bucket people call a bokashi bin is the answer?

Bokashi gets talked about as a faster, easier compost. The surprising part is that it is not really compost at all, at least not when it comes out of the bin. Knowing that one fact changes how you use it.

What bokashi is

Bokashi is a fermentation system for food waste. Scraps go into a sealed container with an inoculated bran, a mix of wheat bran or rice hulls infused with beneficial microorganisms, including lactic acid bacteria, yeasts and phototrophic bacteria. Those microbes ferment the food rather than letting it rot.

The process is acidic, and that high acidity suppresses pathogens and weed seeds. Done right, it smells sour, tangy, pickled or like vinegar, not like sulfur, rot or ammonia.

Bokashi vs compost

Traditional composting relies on aerobic decomposition. Bokashi ferments instead of decomposing, which keeps nutrients in and prevents rot and harmful emissions. It also takes almost all types of food waste, including fruit and vegetable scraps, cooked food, dairy, meat and even small bones.

The trade off is that what comes out is not finished compost. It is an acidic, biologically active pre-compost that must be buried in soil or finished in another compost system before it breaks down fully. Do not leave it exposed or spread it like mulch. If you want finished compost, a compost pile makes it; see how to make compost at home.

How to use a bokashi bin

Add scraps with bran, then compact the food slightly to push out excess air and seal the bin tightly. Keeping air out is essential.

As the food ferments, it releases a liquid called bokashi tea. Drain it every few days to prevent unpleasant odors. Once the bin is full, let it ferment for about two weeks. The food will not decompose completely, but it will develop a pickled smell, which means fermentation worked. If it starts to smell foul instead of pickled, add more bran.

How to use bokashi in the garden

Dig a trench, pour in the fermented waste and cover it with soil. Bury it at least 8 inches deep, so it does not attract animals. Never place bokashi directly against roots or trunks.

Once it is in the ground, the soil takes over. A second, aerobic phase of decomposition begins: the bokashi stabilizes in pH and degrades further to release nutrients. That is the living soil part. Soils naturally contain decomposers, and they need a constant supply of organic matter, or their numbers decline.

Here is where the sources differ

How long before you can plant? One extension page says buried bokashi fully decomposes within two to four weeks. A graduate study describes a two week stabilization phase in the soil, after which the area may be planted.

Is it really anaerobic? Extension pages call bokashi an anaerobic, oxygen free process. A student lab poster questioned that: it measured high carbon dioxide and low methane emissions, which it said suggest not. That is one small lab trial, so treat it as a question, not an answer.

Does the bran matter, and does bokashi feed plants? The pages that explain bokashi credit the microbes in the bran with the fermentation, but the research on what bokashi does is thin, and honest about it. A graduate thesis says little is known about bokashi as a soil fertility amendment, that it is surrounded by bold claims, and that there is a paucity of scientific research supporting them. It also notes questions about why some studies show significant positive impacts and others negligible effects. Its own field trial found that bokashi made from food waste may be a suitable supplemental or alternative fertility amendment in organic vegetable growing.

Where to start

If you have food scraps a pile cannot take, bokashi takes them. Drain the tea, keep the lid shut, and bury the result deep, away from roots. Keep a compost pile or a worm bin for finished compost; worm castings and worm composting covers the second option.