Kelp vs Seaweed- What’s The Difference?

What is the difference between kelp vs seaweed? And why are they used as fertilizer? Isn’t kelp a seaweed? What form should I pick (seaweed powder or liquid extract)? I ask myself all those questions when I look at the different organic and/or natural fertilizers available in the gardening market.

Seaweed is a word used to name many species of aquatic plants, specifically oceanic ones (hence the sea- prefix). Seaweeds can grow like underwater forests, kelp beds (a type of brown seaweed) cover up to 25% of the world’s coastlines. 

Seaweed vs Kelp - Is There Any Difference?

But how does kelp or seaweed help my garden soil and veggies? In the beaches, these plants prevent sand erosion and maintain the ecosystem healthy by feeding animals, as well as providing shelter.

Kelp as a Garden Fertilizer

Thick Brush Stroke

Foraging Seaweed for Fertilizer

If you forage kelp or other seaweeds for fertilizers, follow these tips for better results. – Collect only from the coastlines below the high tide mark, in small quantities, only what you need. – Know that there’s no need to wash the salt away, it contains minerals and nutrients...

If you use Kelp or any seaweed as fertilizer, there are a few things to consider: – You may forage it in small quantities, always trimming the submerged parts of the seaweed, avoid collecting it from the beach. – Notice that seaweed foraging may be an illegal practice in your region.


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