Bokashi composting is a method that has been gaining popularity among gardeners and environmental enthusiasts alike.
Originating from Japan, this process involves fermenting organic waste, including items that are often problematic in traditional composting methods, such as cooked foods, dairy, and meat.
The result is a nutrient-rich pre-compost that can significantly benefit garden soil. Here’s a comprehensive guide on how to use Bokashi in your garden.
Understand Bokashi Composting
Bokashi composting uses a specific mix of microorganisms (often referred to as Bokashi bran) to anaerobically ferment organic waste. This method is fast, efficient, and odorless, making it suitable for indoor use, even in small spaces.
The end product of the Bokashi process is not traditional compost but a fermented material that needs to be further processed in the soil or a compost pile.
Getting Started with Bokashi
- Set Up Your Bokashi Bin: Purchase or make a Bokashi composting bin. This is a sealed container that comes with or without a tap to drain liquid, known as “Bokashi tea,” which is a valuable by-product of the process.
- Add Your Waste: Start by placing a layer of Bokashi bran at the bottom of the bin. Then, add your kitchen waste in layers, compacting it down to remove air spaces. Sprinkle a layer of Bokashi bran over each layer of waste.
- Drain Regularly: If your bin has a tap, drain the Bokashi tea every couple of days. This nutrient-rich liquid can be diluted with water (about 1:100) and used as a fertilizer for plants or poured down drains to help prevent algae build-up and control odors.
- Let It Ferment: Once the bin is full, seal it and let the contents ferment for about two weeks. Keep it at room temperature and away from direct sunlight.
Using Bokashi Pre-Compost in Your Garden
After the fermentation process, the waste will have transformed into a pre-compost state. It’s now ready to be integrated into your garden, but it requires some care to use effectively.
- Bury Directly in the Garden: Dig a trench or hole in your garden soil and bury the Bokashi pre-compost. It should be at least 8-12 inches deep to prevent attracting pests. The pre-compost will typically take about two to four weeks to fully integrate into the soil, depending on conditions.
- Add to a Traditional Compost Pile: If you’re already composting, you can add your Bokashi pre-compost to your compost pile. This can accelerate the breakdown process of the compost pile due to the microorganisms present in the Bokashi material.
- Use in Raised Beds or Pots: For those with raised beds or container gardens, Bokashi pre-compost can be mixed with soil at the bottom of the bed or pot. Ensure it is well covered with soil to allow for proper integration.
Benefits of Using Bokashi in the Garden
- Enhanced Soil Health: The introduction of beneficial microorganisms and nutrients from Bokashi compost supports soil health, improving structure, water retention, and fertility.
- Reduced Waste: Bokashi composting allows for the recycling of a wider range of kitchen waste, reducing the amount sent to landfills.
- Quick Process: Compared to traditional composting, Bokashi is faster, making nutrients available to your garden sooner.
- Low Odor: Since it’s an anaerobic process, Bokashi composting is relatively odor-free, especially when managed correctly.
What should you not do to bokashi?
Bokashi composting is a highly efficient and user-friendly method to recycle kitchen waste, but to ensure its success and avoid common pitfalls, there are several things you should not do:
1. Do Not Add Liquids
Avoid adding liquids like milk, juice, or oils directly to your Bokashi bin.
Excess liquid can disturb the anaerobic environment that Bokashi composting requires and may lead to odors or improper fermentation.
2. Avoid Adding Non-Compostable Materials
Non-biodegradable materials such as plastic, metal, or glass should never be added to a Bokashi bin. Additionally, very large bones or very hard materials that won’t break down easily in the soil should also be avoided.
3. Do Not Leave Air Spaces
Bokashi composting is an anaerobic process, meaning it occurs in the absence of air. When adding waste to your Bokashi bin, be sure to press down each layer to remove air pockets. This ensures a proper fermentation process.
4. Do Not Forget to Drain the Bokashi Tea
The liquid that accumulates, known as Bokashi tea, should be drained every 1-2 days.
If left undrained, it can lead to bad smells and spoil the fermentation process.
Bokashi tea is beneficial for plants when diluted (about 1:100 ratio) but can be harmful if used undiluted due to its acidity and concentration of nutrients.
5. Do Not Open the Bin Too Frequently
Once you’ve added your waste and sprinkled it with Bokashi bran, seal the bin tightly.
Opening the bin too frequently can introduce oxygen, disrupting the anaerobic environment necessary for proper fermentation.
6. Do Not Rush the Fermentation Process
After your bin is full, it needs to be sealed and set aside for a minimum of two weeks to allow the fermentation process to complete.
Trying to use the pre-compost too early can lead to problems, as the material might not be fully broken down and could attract pests or harm plants.
7. Do Not Ignore the Smell
While Bokashi composting should produce a minimal odor, a strong, unpleasant smell can indicate a problem, such as too much liquid, the presence of air pockets, or contamination with non-compostable materials.
A healthy Bokashi bin should have a sweet, pickled smell.
8. Do Not Use Contaminated Bokashi Bran
Ensure your Bokashi bran is sourced from a reliable supplier.
Contaminated or poor-quality bran may not contain the correct mix of microorganisms, which can hinder the fermentation process.
9. Do Not Dispose of Bokashi Tea Incorrectly
Bokashi tea should be diluted before being used on plants or poured down drains.
Undiluted tea can be too strong for plants and potentially harm them.
10. Do Not Bury the Pre-Compost Too Shallow
When integrating the fermented material into your garden, bury it at least 8-12 inches deep.
Burying it too shallow may attract pests and will not allow for proper integration into the soil.
Bokashi composting offers an efficient and sustainable way to manage kitchen waste and improve garden soil.
By following the steps outlined above, gardeners can effectively integrate this method into their gardening practices, reaping the benefits of healthier plants and a more productive garden.
Whether you’re an urban dweller with limited space or a homeowner with a sprawling garden, Bokashi composting is an adaptable solution to enhance your gardening and waste management efforts.
I was born and grew up in Port-au-Prince, Haiti, where my grandmas, mom, and aunts taught me everything about cooking. Now, I live in the US, and I love hiking, reading, and making meals for my family.
