Question
Hope you can answer this question or tell me where to get the answer.  I want to use the black mulch on my plant beds.  However, I've been told the black mulch is dyed to that color.  My question--will dyed mulch have a negative affect on the plants, etc. What can you tell me about it??
Thanks in advance.

Answer
Not only is Black Mulch DYED that way.... YOU CAN BUY the Dye to bring back the dark color of faded, formerly Black Mulch.

www.pinestrawdirect.com/mulch-dye-faq.html

It is my understanding that the Dye may be a Zinc-based paint that stains the mulch.  But the fact is, we don't know.  And the reason is, it's a 'TRADE SECRET' that they will not tell us.

As far as damage to your plants, however, I think we can safely assume these products will have no adverse effects on them.  I'd use it.

THE LONG ISLAND GARDENER