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Friday - February 07, 2014

From: Lorton, VA
Region: Mid-Atlantic
Topic: Erosion Control, Groundcovers, Grasses or Grass-like, Trees
Title: Erosion Solution for Lorton, VA
Answered by: Larry Larson

QUESTION:

We have a steep slope in our common area of our homeowners association. Trees that were planted have died. It is a large area around a pond. What should we plant that will hold the soil? The soil has a lot of clay. Should we also put some topsoil on top? Some members want to install a drip sprinkler system, but others think this will add to the erosion.

ANSWER:

   Mr. Smarty Plants has a solution to all of this controversy with the use of native plants to landscape this area.  One of the finer properties of native plants is that they have developed in their environment to not need any irrigation or exceptional care.  To combat the erosion, we suggest grasses or shrubs that have extended root systems, those will help hold the soil in place and reduce erosion.

 Here is a selection of previous Mr. Smarty Plants Questions and Answers which address questions similar to yours:
Stabilizing a lakeside slope from Bracey, VA
Riverbank retention in VA
Native Groundcovers for Spartanburg, SC
Erosion Control for a NC Clay Slope

  These all have similar enough lists of grasses and sedges that I think you can find a reasonable set of erosion resistant plants from these.  You also mentioned that all the trees that were planted died.   This link is to the Recommended Species list for Virginia.  If you use the “Narrow the list” capability on the right hand side – you will find nine shrubs that will thrive in full sun and 33 different trees.  All of these will be well adapted, but will need a little bit of support in the first years as they get established.  The Wildflower Center also has some advice for planting trees and getting them established, this can be found in the “How-to Articles" and the “Step by Step Guides”.  By the way, there should be no need for irrigation once they get going!

Here’s a few pictures of plants that are on these lists I supplied – I think you can find some likely candidates amongst them!

 

From the Image Gallery


Big bluestem
Andropogon gerardii

Awlfruit sedge
Carex stipata

Pennsylvania sedge
Carex pensylvanica

Common serviceberry
Amelanchier arborea

Wax myrtle
Morella cerifera

Smooth sumac
Rhus glabra

Red maple
Acer rubrum

American holly
Ilex opaca

Virginia pine
Pinus virginiana

More Grasses or Grass-like Questions

Plants for a bare clay slope in North Carolina
December 22, 2011 - Hi - I live near Raleigh North Carolina (border of the coastal plain and Piedmont). I have about 1/2 acre that was excavated for a geothermal heating/cooling system and now I need to stabilize it a...
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Native Desert Willow and bunchgrass for Lubbock TX
July 29, 2013 - We live in Lubbock and have decided to try to make our front yard as native as possible. It has been a very difficult process finding native species locally (even the local Aggie nursery sells a lot ...
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Tolerance to foot traffic for native turf grass
December 16, 2010 - I have read your articles on your mix of three native seeds for turf grass and on other native grasses but am left with a couple of lingering questions. We have about a 600 sq. ft area we want to plan...
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Evergreen grasslike plants for Austin TX
April 15, 2008 - Hi, I'm in Austin, TX and looking for some evergreen grass-looking plants. Would you explain the similarities/differences between Butterfly Iris and Lily Grass in this regard? Thank you
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Plants to replace Phragmites australis (Common reed) in Cedar Ridge Preserve
February 25, 2015 - Dear Mr. Smarty Plants, I live in the DFW area and volunteer at a preserve (Cedar Ridge). We are constantly battling the common reed, Phragmites australis, around the pond. I am wondering what shou...
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