Seaweed as fertilizer

Martin O\’Sullivan asked 12 years ago

Is it safe to use seaweed as a fertilizer on dug ground for a vegetable plot?Does the seaweed contain the necessary minerals needed to enrich the soil? Should I dig seaweed into the soil if it is okay to use?

1 Answers

Gerry Daly Staff answered 3 years ago
Seaweed is more a tonic than a food. It contains quantities of trace elements that are very beneficial for plant growth, but not large amounts of the major nutrients, namely Nitrogen, Phosphorus and Potash, compared, say, to farmyard manure or mushroom compost.

You can scatter seaweed on the soil, dig it in, compost or apply it anyway you like. It releases useful amino acids and the like as it breaks down. Some crops, seaside natives originally, such as beet, asparagus and seakale, benefit especially from a top-dressing of seaweed.