Best Grasses for Bioswales and Vegetated Swales
The best grasses for bioswales are dense, perennial, locally adapted species that can hold soil, slow shallow runoff, and recover after alternating wet and dry…
Bioswale Planting Zones: Wet Bottom, Side Slope, and Dry Edge
A bioswale rarely has one uniform planting condition from edge to edge. The bottom may stay wet after runoff enters, the side slope may shift…
Native Plants for Bioswales: Why Local Species Often Work Best
Native plants often work best in bioswales because they are already shaped by local rainfall patterns, seasonal dry spells, soil conditions, heat, cold, and the…
Best Plants for Bioswales: Grasses, Sedges, Shrubs, and Flowers
The best plants for bioswales are not chosen only for beauty. They need roots that hold soil, stems that slow shallow runoff, and enough tolerance…
Standing Water in a Bioswale: Normal Ponding or Drainage Problem?
Standing water in a bioswale is not automatically a failure. Many bioswales are designed to hold runoff for a short period after rain so water…
Bioswale Mulch Layer: Benefits, Risks, and Maintenance
A bioswale mulch layer can protect exposed soil, slow small surface flows, limit erosion, and support young plants while they establish. It can also create…
Bioswale Filter Media: What It Does Below the Surface
Bioswale filter media is the engineered soil layer that turns a shallow planted channel into more than a drainage path. Above the surface, a bioswale…
Compacted Soil in Bioswales: Why It Reduces Performance
Compacted soil in bioswales reduces performance because it closes the small pore spaces that allow stormwater to soak, spread, and move through the soil. When…
Clay Soil and Bioswales: Problems, Limits, and Design Options
Clay soil can support a bioswale, but it changes what the system can be expected to do. A bioswale in clay should not be treated…
Bioswale Ponding Depth: How Much Standing Water Is Normal?
A normal bioswale ponding depth is usually shallow: enough standing water to slow runoff and allow infiltration, but not so much that the swale looks…