I have recently become interested in rain gardens, and I was looking for some tips and inspiration. These are extremely popular in America, particular Portland, and Sweden, but I am hoping there are some more local examples! the advantages are numerous, including reducing urban heat island effect, increasing biodiversity, reducing the rain water reaching sewers, cleaning up our local streams, and many others.
A rain garden is an area of the garden that has been prepared to collect the water off nearby roofs or hard standing areas like your driveway, allowing the water to filter through the soil to the groundwater beneath. The soil and plants treat the water as it soaks through the ground. The plants are chosen to tolerate the soaking, and then the drying out, such as heucheras, some ferns, Siberian iris, etc. There needs to be a good mix of plants so that there is always some coverage over the ground.
If anyone has chosen to build one, I'd love to hear about it, especially which plants have done well in this country, and any recommendations for others.