By Jane Billinghurst, WSU Skagit County Extension Master Gardener
Volunteer
Prepare to be inspired by the functionality and beauty of
the diverse selection of rain gardens on this tour. From homeowner
installations as part of the Lake Whatcom Homeowner Incentive Program to rain
gardens in co-housing sites and at Western
Washington University ,
you will see how these gardens can be designed to fit a variety of sites and
aesthetics.
All the rain gardens on this tour work to reduce the
quantity and improve the quality of stormwater that runs off roofs, lawns, and
driveways in the heavy winter rains of the Pacific
Northwest .
Packed with native plants to attract birds, this
rain garden makes a lovely urban retreat - a
vast improvement over the grassy berm that used
to run along this narrow backyard.
|
What Is a Rain Garden ?
A rain garden is essentially a stormwater processing facility. It is a shallow
depression that captures fast-moving stormwater and then releases it slowly
into the surrounding landscape.
Stormwater Quantity:
Unchecked stormwater causes flooding and erosion, and causes problems with
combined sewer systems. A primary goal of rain gardens is to interrupt and slow
the flow of stormwater.
Stormwater Quality:
Stormwater picks up pollutants and washes them into local water bodies, and, in
the case of Lake Whatcom , into a source of drinking
water. Pollutants include pet waste, pesticides, and excess fertilizers from
landscapes; and oil, copper, and zinc from cars. Rain gardens help remove these
pollutants from stormwater.
Stormwater Processing:
Even in heavy storm events, the rain gardens on this tour drain quickly.
Instead of having water rushing down storm drains or along ditches, or water
levels rising close to homes, rain water puddles in the gardens and then soaks
into the specially designed soil
Attractive Wildlife
Habitat: Native plants adapt well to rain garden conditions and attract a
host of beneficial insects and birds. Extra color and diversity can be added by
including some hardy cultivated varieties of plants that enjoy growing
conditions in the Pacific Northwest .
When I was checking out these rain gardens, I saw hosts of
beneficial insects on columbine, camas, and spirea. There were birds perching
in ninebarks and hazel, and bathing in attractively designed bird baths.
Despite a few days of heavy rain (and a downpour while I was visiting!), none
of the rain gardens had standing water. All were beautiful.
| The plantings in this colorful rain garden with abuzz with bees. |
On the Tour:
Homeowners will be on hand to explain the process of installing their gardens
and how they have benefited from the Lake Whatcom Home Incentive Program. Rain
garden experts from the City of Bellingham
and WSU Extension will explain how rain gardens work and what steps you can
take if you are inspired to install a rain garden of your own.
Rain Garden Tour de
Bellingham is from 9:30 am to 12:30 pm on Saturday, June 1. The $20 fee
includes lunch and transportation. Register online at http://raingardentour.brownpapertickets.com. The tour is co-hosted by RE Sources, City of Bellingham , Sustainable Connections, and WSU Whatcom
County extension. After
the tour, you are invited to stick around for the Watershed-Friendly
Project Expo at Bloedel
Donovan Park
from 1 to 3 pm.
To find out more about home
owner incentives in the Lake
Whatcom watershed,
download the Homeowner
Incentive Program Brochure (PDF).
To find out more about WSU
Extension’s rain garden resources for homeowners, visit www.12000raingardens.org.
All photos by Jane Billinghurst

