How about a Raingarden?

Raingardens are growing in popularity as an attractive, low-maintenance landscape alternative that helps protect and restore water quality. They are designed and planted to capture rain water so it can penetrate into the soil. This reduces the stormwater runoff that takes pollutants from the air, yards and streets and carries them into lakes, rivers and wetlands.

Metro Blooms is hosting a Raingarden workshop in Waconia on April 7th. The cost is $10.

I went to this last summer in Chaska and it was quite enjoyable. These guys “wrote the book” on raingardens and do a great job with their workshops.