Native Plants
Q. Who is Mr. Smarty Plants?
A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.
Did you know you can access the Native Plant Information Network with your web-enabled smartphone?
Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.
rate this answer
Wednesday - February 29, 2012
From: Cary, NC
Region: Southeast
Topic: Erosion Control, Groundcovers, Shade Tolerant, Ferns, Grasses or Grass-like
Title: Erosion control for a North Carolina creek side
Answered by: Becky Ruppel
QUESTION:
Hello Mr. Smarty Plants! I noticed a question on your website recommending NC native grasses and plants to help prevent erosion on a sloping backyard, including the use of an erosion blanket. The plants you recommended were for a sunny backyard, and our situation is a little different. We have several creeks (more like drains for runoff) that run through our neighborhood, and ones goes through our backyard. With the last few heavy storms that crossed through the Raleigh area, we started experiencing some major erosion along the banks, including under a little bridge that crosses the creek. We are having a retaining wall built under the bridge, but would like to control the rest of the erosion with native plantings if possible. We have lots of oak trees in our yard, and it only has sun for about 1/2-3/4 the day in the winter/spring, and then mostly dappled shade in the summer and fall. What plants would you recommend for these conditions to help slow the erosion? As an example, we have a few yucca plants that are planted on the banks that seem to be doing well. Thank you so much!ANSWER:
There are many native plant options to control erosion along creek sides in North Carolina. The plants that will work the best will be quick growing, will have good root systems, and will tolerate occasional flooding. The plants should also be shade and wet soil loving. Though you may want to check how wet your soil stays and adjust which plants you select based on the general wetness of the soil. Since you mentioned a grass option above here are a couple species that are likely to help control the creek side erosion problem. The first two are some sedges Carex amphibola (Creek sedge) and Carex crinita (Fringed sedge). Both species grow by creek sides and form good root systems. Another option is a grass, Calamagrostis canadensis (Bluejoint). This grass should be happy growing with the sedges, and forms clumps and should help keep the soil in place as well. All three options should grow happily together if mixing them sounds like a satisfying option.
Another interesting option would be planting some fern species. They are typically very happy growing in shady wet areas. A couple of options are Dryopteris ludoviciana (Southern woodfern) and Onoclea sensibilis (Sensitive fern). Both will form good root bases and will be pretty in the spring when Onclea forms fiddle heads.
If you would like to explore other options, check out the Wildflower Center’s Native Plant Database. When on the page you can do a combination search, selecting “North Carolina” from the States and Provinces dropdown menu. Then select “perennial” from the Duration dropdown. Finally, check the boxes “wet” (or moist if that is more accurate for the soil on the creek side) from the Soil Moisture section and “shade” from the Light Duration section. Then press the Submit Combination Search button. This should return several pages of results and you can browse them to see if there are any other plants that you would like to plant on the creek side.
More Erosion Control Questions
Plants to prevent bank erosion in Virginia
April 02, 2009 - I am looking for good native plant choices for a steep river bank. My driveway is at the top of this slope, so I will need to avoid any plants that would cause erosion. I would prefer low shrubs.
view the full question and answer
Controlling slugs in a Pacific Northwest strawberry patch
February 04, 2013 - Would love to plant various varieties of strawberries on a bank for erosion control and ground cover. How can we keep the slugs at bay? We are in the the Pacific Northwest
view the full question and answer
Native grass and/or wildflower seed mix for erosion control in North Carolina
June 23, 2009 - I'm looking for a native grass and/or wildflower seed mix to control erosion on a new mountain road in a pine forest (red clay dirt). The soil is dry and partly shaded, depending on the hour of the d...
view the full question and answer
Exposed Tree Roots in Austin
September 04, 2012 - I have a large ash tree with a lot of mud at the top of a sloping yard. I want to build a small retaining wall with the ground leveled above. This would entail covering exposed tree roots with 4-18 in...
view the full question and answer
Revegetating a hillside in western Washington state
October 10, 2012 - Removing several downed trees across my dock demolished the native plants growing on the hillside and the contractor pulled out their remains. The area faces east on an open freshwater bay. Close to...
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |