Seaweed is an excellent source of nutrition for plants as well as people. It is a broad spectrum of fertilizer that can promote plant growth. It is a good source of potassium and magnesium. And also trace elements (nutrients that plants require only in small quantities) including iron, manganese, zinc, copper, and boron.
#12 Ground Covers and Green Manures
A living mulch can be used to create ground cover between plants or can cover bare soil during the winter, or during gaps in a crop rotation scheme.
#13 Landscaping Fabric
Landscaping fabric is generally plastic, and not the most environmentally friendly choice. However, it can be beneficial where weeds are a major problem, especially when soil cover is needed on a larger scale.
This is a cheaper and more eco-friendly alternative to plastic membrane type soil covers. Cardboard will obviously break down over time, but it can last long enough to suppress weeds or grass growth and allow you to establish a new garden area. Save your cardboard boxes!
These mulches are often used for decorative reasons, or to keep a garden looking neat. Slate mulches will help in preventing water from pooling around the base of plants that don’t like wet feet, and can also help in retaining heat in a growing area.
Gravel mulches come in a wide range of grades, textures and colours, so are often used decoratively in garden design. Like slate, they can also improve drainage, and stop soil from splashing up onto plants. Succulents and other rock garden plants will benefit from a mulch of this type.
If you like a more organic look, natural pebbles are an alternative to aggregate and gravels. Again, they can be used to create a range of different decorative effects, as well as serving the same functions as the above.
#18 Sea Shells
Another organic solution for garden design is to use seashells as mulch. Seashells also protect the soil surface and yet are most frequently used to give a seaside feel in a garden.
#19 Tumbled Glass
Tumbled glass or sea glass in a range of hues can add colour and interest to containers, beds or borders. And while an organic mulch is better, decorative mulches will still help to protect the soil and keep water and nutrients where they need to be.