description Ecklonia maxima Overview
*Ecklonia maxima* is a large brown alga in the kelp order Laminariales, native to the cold, wave-exposed waters of southern Africa. It forms underwater kelp forests and is commercially collected in South Africa, where extracts are used in agricultural products such as plant biostimulants and fertilizers. The species is studied both as a habitat-forming seaweed and as a source of bioactive compounds.
help Ecklonia maxima FAQ
Where does Ecklonia maxima grow?
Ecklonia maxima, often called sea bamboo, is a large brown kelp from the cold, wave-exposed waters of southern Africa. Its range extends from north of Lüderitz in Namibia to De Hoop in South Africa, where it forms canopy kelp forests. [Species profile](https://www.1ksa.org.za/species-cards/ecklonia-maxima)
Why does Ecklonia maxima form a surface canopy?
A holdfast anchors the kelp to rock, while its long stipe and gas-filled structures lift the blades toward the surface. This arrangement helps the plant reach light and creates shelter above the rocky seabed. [Marine Protected Areas South Africa](https://www.marineprotectedareas.org.za/kelp-forests)
Is Ecklonia maxima used in agriculture?
Yes. South African products such as Kelpak are made from freshly harvested Ecklonia maxima using a cold Cellburst extraction process and are sold as plant biostimulants. The products are marketed for effects including root development, flowering, fruit set, and stress response. [Kelpak brochure](https://www.kelpak.com/pdf/publications/kelpak_brochure.pdf)
Is Ecklonia maxima commercially useful outside agriculture?
In South Africa, fresh Ecklonia fronds are also used as feed for farmed abalone. The species is therefore commercially collected both for agricultural extracts and for aquaculture feed. [South African seaweed sector report](https://www.dffe.gov.za/sites/default/files/reports/research/fisheries/descriptionofcommercialseaweedsector.pdf)
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