If you’re interested in how to build a rain garden, a step-by-step process can be easily learned by attending a rain garden workshop, studying the Washington State University Rain Garden Handbook for Homeowners (18MB PDF download) and viewing the “How to build a rain garden WSU” online video (below). You will learn rain garden design and construction basics like:
How to determine how much impervious surface you have, and how much of that water you want to manage.
How to decide where on the property you’d like to build your rain garden.
How to do a percolation test, to make sure the soils surrounding your rain garden plants can soak up the water.
How to decide how big of a rain garden to create in the space you have available.
How to implement rain garden construction next steps.
How to know what the best rain garden plants are.
How to maintain a rain garden.
You don’t have to be a gardener or an engineer to build a rain garden, but it is important to consider your site carefully before you get started.