Composting
Q.

seaweed in compost/garden

Zone 02050/zone 6 to 5 | garden2001 added on April 22, 2017 | Answered

Do I have to rinse the seaweed before adding to compost pile and can I use it as a mulch in the garden without rinsing ?

A.
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roseman
Answered on April 23, 2017

I would not recommend using it without rinsing it off in good clean water. The salts it may have on it could be harmful to the feeder roots on plants. I recommend rinsing it off well then letting it dry out and smashing it up, then add it to the gardens as an additive. Kelp meal (seaweed) has many beneficial nutrients and is a great soils building amendment if used properly. Rosebushes love kelp meal.

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