Dr. Russell Sharp explores recent research into biostimulants made from sea urchins—created to reduce urchin overpopulation in kelp forests and potentially used in hydroponics.

The episode compares sea urchin products to traditional seaweed extracts, discusses variable growth results (lettuce trials), sustainability and regulatory concerns, and concludes seaweed extracts currently outperform sea urchin biostimulants for plant growth.

https://eutrema.co.uk/shop/organic-fertilisers/seaweed-extract-cold-processed/