Perhaps one of the reasons that plant survival has been so successful on SEA Street is that the local residents have taken responsibility for maintenance. Neighbors have agreed to care for the plants within the right-of-way through weeding, mulching and mowing when necessary.
As we have learned on SEA Street, one of the keys to successful implementation of Natural Drainage Systems is designing the right-of-way to be beautiful as well as useful. If neighbors like the way the street looks, as it changes from season to season, they are more likely to help care for it.
The neatly trimmed grass strip along the roadway, shows the interest that neighbors take in caring for the landscaping. Within the context of the naturalistic planting pattern on the street, these grass strips create a consistent boundary between road and landscape.