We prattle on about turning bioretention systems into self-sustaining ecosystems. Recently we stumbled across a system as close to what we have in mind as we have ever seen. Unsurprisingly its our new favourite bioretention system.
The funny thing about this system as this we've been to it before. A little over 3 years ago. At that point it was nice... but only nice. It sure has grown over time.
Check it out on The WSUD Map. It's asset number B00081.