Coconut husk as edging has been the regular feature of our little garden here. It doesn't provide modern and cosmopolitan feel of course, but it blends well with the surrounding and introducing rural look within our garden.
We use these extensively as edging for the vegetable bed. The plants, sweet potatoes had been pulled out and allowed to dry and decompose while we are planning for the next crop. The one around the big ginger plant (lengkuas) had performing well, creating really cool environment for the ginger.
And the coconut husk will go a couple of rounds before it start to decompose....