It really is dependent on the area. Where I am 100% cyprus is only available at pet stores the stuff from a garden centre has cyprus, cedar, Douglas fir, and pine bark and chips. It is often stained red or black too, and is not sold for use with food crops. I would not suggest using what I can get at all. Be careful when you do find it get a sample and check through what is there and see if you can identify what is in it.
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