A composting bin

Can I put mung beans in my compost bin?


You can put mung beans into your composting bin!

Key info
Green material📂
3-6 months

Get the right balance of brown and green composting materials in your bin with our expert guide.

Composting Mung Beans: A Detailed Guide


Mung beans (Vigna radiata) are small green beans that are commonly used in various cuisines across Asia. Their ability to fix nitrogen makes mung beans useful as a cover crop or green manure. Additionally, mung beans can be composted at home to create nutrient-rich soil amendments. This article will provide a comprehensive guide to composting mung beans, including key information such as their carbon-to-nitrogen ratio, decomposition timeline, and best practices.

Can Mung Beans Be Composted?

Yes, mung beans can successfully break down in a home compost bin. When added to a compost pile with other organic materials like leaves, food scraps, or straw, mung beans will decompose over 1-2 years. The end result will be finished compost that can be used to improve soil structure and provide nutrients for plants.

Key Details About Composting Mung Beans


Mung beans are categorized as a "green" composting material since they are a fresh plant-based item high in nitrogen. Greens are essential for a healthy compost pile.

Carbon-to-Nitrogen Ratio

The carbon-to-nitrogen ratio (C:N ratio) of mung beans is around 30:1. This moderately high carbon content helps provide an ideal balance of carbon and nitrogen for effective composting. Mixing mung beans with high-nitrogen materials can optimize the C:N ratio.

Decomposition Timeline

Given their hard outer shell, mung beans take longer to break down compared to other green materials like fruit and vegetable scraps. Expect the composting process to take 1-2 years before mung bean pieces fully decompose. The timeline can vary based on factors like aeration, moisture, pile size, and ratios of ingredients.

Best Practices

Follow these tips to compost mung beans successfully:

  • Chop or grind beans into small pieces to accelerate decomposition
  • Bury beans under 10-12 inches of other compost ingredients
  • Maintain 40-60% moisture in the pile
  • Turn or mix the pile monthly to introduce oxygen
  • Include diverse nitrogen-rich co-materials like grass clippings
  • Use a ratio of 2:1 browns to greens once mung beans are added

Frequently Asked Questions

What are some examples of "brown" materials to compost with mung beans?

Good carbon-rich additions include dried leaves, branches, twigs, straw, shredded newspaper, or sawdust.

Can the whole mung bean plant be composted?

Yes. Chopped mung bean plant residue like vines, leaves, and roots can all be added to a compost pile in addition to the beans themselves. This green material will enrich the nitrogen content.

What can finished mung bean compost be used for?

The dark, crumbly compost can be mixed into garden beds or container plant soil to provide nutrients. It also improves moisture retention, drainage, and aeration for plant roots.


Composting mung bean plants or grains is a sustainable way to boost your garden soil health. Allow 1-2 years for full decomposition. Combine mung beans with a diverse mix of greens and browns, maintain ideal moisture and airflow, and frequently turn the pile to yield high-quality compost. Follow the best practices outlined to successfully recycle mung beans through home composting.

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