Quote:
Originally Posted by aruzinsky
Do you have empirical proof that biochar improves the growth of plants? I would like to see a side by side comparison of plants grown in soil or potting media with biochar versus perlite because I am not going to use biochar based on theory alone.
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Biochar/horticultural charcoal has a high cation ratio
Perlite has a cation ratio of zero
Moisture is also important for plants and biochar/horticultural charcoal holds much more moisture than perlite and lump charcoal holds very little.