Rain Garden Soil
This material acts in a similar way to the Bio retention soil blend.
Rain Gardens are another aspect of SuDS and serve as more of an attractive landscaping feature rather than acting like a bio retention swale and functionally managing rain water run off. The principle is similar to the bio retention soil and acts to slowly store and manage the rain water, which moves through the soil at a controlled rate in order to avoid flooding. They usually move water at a rate of 25-150mm per hour and we can control this through the use of materials like as expanded clay pellets.