# Does Blood Make Grass Grow?
All grass types need nitrogen to grow well. Dried blood, sometimes called blood meal, is a good source of organic nitrogen for lawns and plants. Dried blood, however, is not a complete fertilizer, and its use should be supplemented with other organic or synthetic sources for a healthy lawn.
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Source
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Cattle is the main source of blood meal. Blood meal is derived primarily from slaughterhouses. It has a typical analysis of between 12-0-0 and 12.5-1.5-0.6.
How to Use
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Like all organics, blood meal is activated by microbial activity in the soil. As an organic lawn fertilizer, blood meal releases its nitrogen slowly over a two- to six-week period. It should be reapplied every six to eight weeks to the lawn throughout the growing season.
Precautions
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Applying too much blood meal can burn lawn roots. Dried blood is a highly concentrated source of nitrogen. Avoid applying more than the recommended rates.
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