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What's a Rain
Garden?
A "Rain Garden" is simply a shallow
depression in your yard that's planted with native wetland or wet prairie
wildflowers and grasses.
Why plant a Rain
Garden?
The Rain Garden is one of the most
popular new perennial garden designs for three reasons:
1. Rain Gardens make good use of rainwater runoff, thus conserving
precious water supplies and helping protect the water quality of downstream
lakes and rivers.
2. Rain Gardens are planted with native wetland and prairie wildflowers
and grasses. These perennial plants naturally grew here when the first
pioneers rolled across our land-so they're hardy and low-maintenance, not to
mention beautiful!
3. Rain Gardens provide food and shelter for many interesting birds,
butterflies, and beneficial insects-mosquitoes! - and they'll provide you with
many hours of enjoyable bird watching.
How do I make a
Rain Garden?
Size, soil type and vegetation are
important factors when designing a rain garden. Rain gardens can be
designed in any shape. Long and narrow ones may best fit between houses
and sidewalks. Typical gardens are 100 to 300 square feet. For roof
top runoff, place rain gardens at each down spout, at low points in the lawn.
Each garden should be one-third the size of the roof area being drained.
To control driveway and sidewalk runoff, apply these same concepts.
For rain gardens to infiltrate runoff,
soil needs to be porous enough to quickly soak up water-ideally emptying within
48 hours. This helps prevent plants from drowning. It also prevents
gardens from becoming mosquito breeding grounds.
Where should I put
my Rain Garden?
Rain Gardens should be at least 10
feet from buildings to prevent foundations and basements from being damaged by
water. They should be 35 feet or more from septic system drain fields, and
50 feet or more from drinking water wells.
Other Questions?
Contact the Douglas SWCD for more
information or help with garden designs.