Organic landscaper Rachel DeToro tells us one of her favorite tricks for container planting is using seaweed as mulch. The seaweed can be rinsed (to remove salt and the pungent smell) and dried for use in potted plants.

The mineral rich material helps retain soil in the pots by blocking drain holes, which allows water out but not soil, and also makes a great mulch for the top of the pots to prevent erosion. Seaweed also works in the garden for all-around mulching duties and is especially good for vegetable gardens.

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