Can compost be used as mulch? What is the purpose of compost?

Mulch reduces moisture evaporation, moderates the temperature of the soil, reduces compaction of the soil, suppresses weeds and should eventually break down and become part of the soil.

So, in answer to your question of can compost be used as mulch, it depends on the type of compost. If the compost you wish to use is has the traits described above, then yes, you can use compost as mulch. However it’s unlikely that it will perform as well as mulch. I would recommend you staying away from chipped or shredded mulch and try using composted mulch.

Here’s an interesting article about composted mulch.
Which is better for plants, chipped mulch or shredded mulch? – Cowen Landscapes Landscaping & Gardening Services in Maidstone

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