Will bark mulch ‘rob’ the soil of nutrients

There’s a common concern among gardeners that using bark mulch might “rob” the soil of nutrients. The worry stems from the idea that as bark breaks down, it could use up nitrogen and other essential elements that plants need to thrive. In reality, this effect is usually minimal and mostly confined to the very surface layer of soil where the mulch and soil meet. Established plants with deeper roots are rarely affected.

Using bark as a mulch can actually benefit soil health over time. As it slowly decomposes, it adds organic matter, improving soil structure and water retention. While a temporary dip in nitrogen can occur if fresh, uncomposted bark is used, this is generally not a problem if the mulch has been aged or treated. Many gardeners simply add a light feed to the soil if they are concerned about nutrient levels.

Applying bark correctly also matters. Spreading a consistent layer, rather than piling it against stems or trunks, helps prevent any potential issues and supports healthy plant growth. For those looking for reliable bark options, AHS LTD provides varieties suitable for garden use that help maintain soil vitality while keeping beds looking neat and well-kept.