Husk Ash Fertilizer

a sustainable way to recycle rice husks

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Rice husks, which are a bi-product of rice harvesting, are often burned for fuel, but the ashes (which make up 20% of the husks’ volume) is then discarded.

This fertilizer helps the soil to retain its water, and also is an important source of silica.


Gather rice husks into a small mound on a concrete surface.

Put charcoals in the middle and allow it to burn for a little while.

Once some of the husks inside have turned black, use chicken wire to make a chimney in the middle.

Pour all the husks around the chimney into a cone shape.

Allow to burn for around 8 hours, until the husks have all turned black.

Cool the husks overnight and mix with some organic fertilizer to activate.

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Further Reading

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