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Seaweed as a mulch

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Is it any good ?
Why / why not ?
cheers
Bad as it's quite salty and takes aaaaaaages to actually break down
Ummm...that's what I would have thought but...

The sea is more than salty water. The sea is a vast nutriment. It contains a large spectrum of trace elements in suspension, and some of the debris that is washed up on the beach like seaweed and shells also contains a quite a lot of these trace elements. Seaweed is one of the best soil conditioners of them all. Note: There are regulations governing the quantity and removal of seaweed from beaches. Permission is required so check with your local council for more details. If you can acquire some seaweed how can you use it?

Seaweed itself contains very little salt. It is the sea sand that is enmeshed in it that is quite alkaline and needs to be removed. It can be used around almost any plant except acid loving plants like rhododendrons and azaleas or strawberries. It can be placed around but not near the actual plant, covered by peastraw or mulch, and will gradually convert to a jelly-like substance. Seaweed is not a fertiliser but a soil conditioner that has an amazing beneficial effect on plants. It can make them frost resistant and more resistant to diseases. The trace elements in the seaweed eventually are transferred to the soil and into the plant and its fruit.

http://www.abc.net.au/gardening/stories/s795262.htm
Seaweed can be good sometimes but don't expect it to be better than seasol
The seaweed we fine on our beaches is not even close to having what King Island Bull kelp has.

I don't personally condone the use of seaweed because it plays such a vital part of beach construction. It helps bind sand and stabilise the beaches. areas that it gathers in would be absolutely knackered if the seaweed wasn't there. It also provides coastal plants with vital nutrients that they specifically need.

You are far better to use green mulches from tree loppers or as a second straws in comparison to seaweed.

You can get into a bit of strife here for gathering it off the beach because of it's importance in beach stabilisation.
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