There is more to mulch than meets the eye. Specifying the right mulch for your project contributes to the additional 40% improved performance of your garden. The ability for your plants to thrive is not merely trial and error, but a careful assembly of components, that together form an optimum environment for plant growth. This is particularly important when constructing gardens in confined spaces or spaces that are surrounded with concrete and building structure, where the environmental stresses on a plant can be amplified. Careful consideration should be given when trying to design high performance gardens such as Sensory or Memory Gardens where the success is measured by the level of stimulation to the visitor. Traditional 5 senses; sight, smell, hearing, touch and taste. Refer to the following article from Ozbreed. Mulch – The Good the Bad and the Ugly