How do I know if bark mulch is free from contaminants

Knowing whether bark mulch is free from contaminants isn’t always obvious at a glance, but there are a few signs and checks that can help put your mind at ease. Start by paying attention to the appearance and smell. Quality mulch should have a pleasant, woody scent—not something sour, musty or chemical-like. If it looks overly mixed with green waste, soil or litter, it may not have been properly processed.

Another good indicator is the consistency of the bark itself. Clean mulch tends to be fairly uniform in size and free from obvious scraps of plastic, metal or treated timber. These unwanted materials can sneak into poorly screened batches, so it’s worth being observant before spreading it across your beds or borders.

Reputable suppliers like AHS Ltd take steps to ensure their bark mulch is screened and processed to meet recognised standards. This includes measures to remove weed seeds, pathogens and other contaminants that could affect your soil or planting. If in doubt, it’s always better to choose a mulch that’s been clearly sourced and processed for horticultural use rather than relying on the unknown.

A little attention early on can save time and effort later, keeping your garden healthy and looking its best.