Maintenance

On-going maintenance is essential to keep your RainWise installation working at its best.

Well-maintained RainWise projects are key at keeping stormwater out of the sewer system. Less stormwater means less overflows into our waterways! Your cistern and/or rain garden is made possible with public funds. In return, RainWise requires homeowners to maintain their RainWise project for five years. 

.

RainWise Maintenance Guide

RainWise Maintenance Videos

Cistern Maintenance Video

Maintaining your cistern is easy! Watch our cistern care video, also available in:

Rain Garden Maintenance Video: Weeding and Mulching

Rain gardens require routine maintenance that even an amateur gardener can do! Watch our rain garden care video on weeding and mulching, also available in:

Rain Garden Maintenance Video: Watering


Rain gardens need regular watering during dry months, especially in their first year. Watch our rain garden care video on watering, also available in:

Maintain Your Installation

Hire a Contractor to do Maintenance

Rain gardens and cisterns need regular upkeep, and RainWise contractors are available to help with tasks like weeding, mulching, and checking drainage. Staying on top of maintenance protects the installation and keeps stormwater out of the sewer system.

Visit the Find A Contractor page

Talk to a Gardening Expert

Not sure where to find arborists’ wood chips for fresh mulch? Need help with rain garden plants and weeds? Wondering how to care for your new rain garden? Contact the Garden Hotline at 206-633-0224 or help@gardenhotline.org. Multi-lingual services provided.

Learn more about the Garden Hotline

Read the RainWise Homeowner Agreement (PDF), which you signed before receiving your rebate.

If you are selling a home with a RainWise installation, your cistern and/or rain garden must be listed in your Seller’s Disclosure Form. Please email us at rainwise@seattle.gov to let us know.