Black, Red, or Brown? The Truth About Dyed Mulch Safety for Gardens and Pets
High-quality dyed mulch made with carbon-based or iron oxide colorants is generally considered safe for ornamental landscapes. University of Massachusetts guidance reports no evidence that common mulch dyes are toxic. Iron oxide is a compound of iron and oxygen, while carbon-based colorants are similar to materials used in inks and cosmetics. The wood source matters […]