Does polyester fabric hinder beneficial microbial activity in outdoor tree box soils?

Polyester fabric is commonly used in urban landscaping, including tree box installations, but its impact on soil microbial communities remains a topic of debate. Research suggests synthetic materials like polyester may alter soil conditions by reducing air and water permeability, potentially creating a less hospitable environment for beneficial microbes. These microorganisms play critical roles in nutrient cycling, organic matter decomposition, and plant health.

Studies indicate that while polyester doesn't directly kill soil microbes, it may limit their activity by changing soil temperature regulation and moisture distribution. The fabric's hydrophobic properties could create dry zones unfavorable for microbial growth, while its dense weave might restrict oxygen flow essential for aerobic microorganisms.

However, some findings show microbial adaptation over time, with certain species thriving near synthetic barriers. The long-term ecological consequences of using polyester in tree boxes require further investigation, particularly in urban environments where soil ecosystems already face multiple stressors. Sustainable alternatives like biodegradable fabrics or modified polyester blends with improved permeability are being explored to support both structural needs and soil biological activity.