Cultivation

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Study

Coffee Grounds With Coal Ash Grow Mineral-Rich Oyster Mushrooms

Coffee Grounds With Coal Ash Grow Mineral-Rich Oyster Mushrooms

Oyster mushroom

What they found

Coffee grounds with 1-5% coal bottom ash improved oyster mushroom growth and mineral content while reducing harmful metals.

Coffee grounds with 1-5% coal bottom ash improved oyster mushroom growth and mineral content while reducing harmful metals.

The number

1-5% coal bottom ash

How solid is it?

Field study

Field study

Cultivation trial

Cultivation trial

Evidence ladder: Lab dish → Animal → Early human → Strong human. Reviews summarize earlier research.

At a glance

Latin name

Published in

Scientific Reports

Scientific Reports

Covered in Shroom Scan

Section

GROWING GOURMET

GROWING GOURMET

As it ran in Shroom Scan

Coffee for Oysters

Coffee for Oysters

Combining coffee grounds with 1-5% coal bottom ash enhances oyster mushroom growth while improving mineral content, including phosphorus, copper, and zinc, and reducing harmful metals like chromium and lead. Higher ash levels, however, halted growth. The leftover substrate proved nutrient-rich, with increased nitrogen and sulfur, offering potential as an eco-friendly fertilizer.

Combining coffee grounds with 1-5% coal bottom ash enhances oyster mushroom growth while improving mineral content, including phosphorus, copper, and zinc, and reducing harmful metals like chromium and lead. Higher ash levels, however, halted growth. The leftover substrate proved nutrient-rich, with increased nitrogen and sulfur, offering potential as an eco-friendly fertilizer.

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