Often, yes. Compost can be used to amend existing soil to increase organic content and promote root growth for turf and plants. Bioretention facility planting soils often use compost as part of the soil blend to provide the proper organic matter for plantings in these areas.
How do bioretention soils both slow the flow of stormwater and reduce pollution?
Appropriate quantities of compost provide both a short term and long term positive impact on soil structure. With compost, the soils resist compaction in finer soils and provides greater drought resistance and water holding capacity in coarse, sandy soils. Soil porosity is key in soil structure and the coarse organic texture of compost creates an environment for better root development. Compost increases Cation Exchange Capacity (CEC) which is the ability for soils to retain micro nutrients for the plant to utilize and lowers nutrient leaching. Compost supplies many beneficial micro-organisms and nutrients to soils and growing media as well as bind and degrade specific pollutants – a strong characteristic in bioretention soil use.