The EPA's Rain Garden
Last week in Washington, on Tuesday, in the rain, we sloshed by the Environmental Protection Agency's Washington office. They have a rain garden between building and sidewalk! Of course it's the government that brought you "Advanced Interrogation Techniques" so they refer to it as a "Bioretention Cell." Sounds like a cell of bio-terrorists.
The purpose is to have the garden act like a sponge to absorb storm water runoff. Underneath the garden are a drainage pipe and bed of gravel topped with porous soil and mulch. The plantings are both water and drought-tolerant (??), and keep soil from compaction. All we saw was this great display of tulips, trees, shrub and grass. I'd love to see what other plants–the perennials–they have for this garden. And I'd like to see them when it's not raining.