If you’ve been shopping around for mulch, you may have seen the term “AS 4454 certified” and wondered what it actually means — and whether it really matters when choosing mulch for your garden. The short answer? It matters. AS 4454 is the Australian Standard for composts, soil conditioners and mulches. It sets minimum requirements around the physical, chemical and biological characteristics of these products, helping provide customers with confidence about the mulch they’re p