Answer: I am not aware of any contraindication for using it. However, to be honest I have never seen licorice mulch for sale that I can remember. It is my understanding it is very expensive when compared to other available materials. You could use straw or hay (keep in mind hay may contain more weed seeds than straw) or half finished compost, or rotted fall leaves, or whatever you have access to. So you might want to see what is available locally at a reasonable price and work from there.
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