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One of the first questions many people ask is "What am I going
to do with a large mound in my back yard?" Granted, having a hill
that is typically three or four feet high and can be as long as
90 feet offers a unique challenge to the landscaper. There are,
however, several things you can do to help protect the mound and
make it visually appealing at the same time.
The right vegetation cover helps keep the mound intact, as well
as making it more attractive. But, the wrong cover can do irreparable
damage to the mound. Do not plant trees, shrubs, or any plant with
extensive root system on the mound. The roots will interfere with
and possibly destroy the distribution system. The mound can be framed
with trees or shrubs, but they should be at least 20 feet away.
It is also ill-advised to plant vegetables or herbs on the mound.
The best things to plant on the mound are low-maintenance grasses
- a mixture of creeping red, hard, and sheeps's fescues works well
- or perennial flowers, such as daylilies and peonies. (See the
chart below for some ideas about what can be planted successfully
on a mound.) Because the mound will tend to be dry on top, plant
grasses and other ground cover that are resistant to water stress
there. Cool-season grasses and other plants may be planted on the
sides of the mound. Be sure to wear gloves when landscaping the
mound.
Use minimal tilling when planting and establish a cover as quickly
as possible to limit erosion. The topsoil on the mound should be
at least six inches, but no more than 30 inches deep. Keep traffic
on the mound to a minimum; if you plant a lawn grass, plan to mow
it only two or three times a year. If you have pets or young children,
you may need to erect a fence around the area. Do not irrigate or
water the mound once you have vegetation on it.
The actual shape of the mound may change to suit individual landscaping
and site needs. Constructing a contoured mound works well for hillsides.
One built at a right angle can be used in the corner of a property.
A rectangular mound is often used when there is plenty of room and
uniform slope. Landscaped areas around the mound can serve as a
privacy barrier, a windbreak, or as a screen to block unsightly
views.
While having a mound as part of the home's landscape isn't always
desirable, the right landscaping can minimize the aesthetic intrusion
and maximize protection of this valuable investment.
(This planting information is also appropriate
for standard septic systems.)
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