En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Controlling erosion with grasses in Dallas, TX

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.

Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Saturday - October 19, 2013

From: Dallas, TX
Region: Southwest
Topic: Seeds and Seeding, Grasses or Grass-like
Title: Controlling erosion with grasses in Dallas, TX
Answered by: Jimmy Mills

QUESTION:

After consulting with several geological engineers and the city of Dallas engineers - we know that our severe erosion problem can only be fixed by building a 35' foot high gabion wall about 150' in width. Due to the expense, it may be several years before the construction takes place. Currently the slope to the creek is nearly nonexistent - but rather a near vertical drop off. We've lost 4 large trees within the last 2 years due to loss of soil around the roots, and an arborologist has given a dire prediction of losing an additional 5 - 7 trees within the next few years. We are desperately trying to hang on to as much soil as possible until the walls can be put in. We built a 2' retaining wall located 4' before the drop off. Due to the instability of that area - we were instructed not to due any digging. Plus it's not a stable area to do a lot of gardening type work. Last spring we attempted to introduce inland sea oats, which seemed to do well until June - and the heat/sun seemed to kill them off. We are in need of a year round plant for that area (some is in the sun for 6 hours per day, some in in the shade) that we can simply spread by seed as we cannot till or dig. We've been informed the area is too small and unstable for erosion control blankets - so one issue is how to keep the seed on the land without it washing down into the creek. We've contacted almost every agency in Texas that deals with erosion and each one of them has been at a loss other than to get the gabion walls in as quickly as possible. But we are on the city's timeline. Thank you in advance for your recommendations

ANSWER:

That sounds like quite an undertaking, and the engineering aspects of the project are far removed from Mr. Smarty Plants area of expertise. But since you mentioned Inland Sea Oats (Chasmanthium latifolium (Inland sea oats), lets talk some more about grasses. We often suggest using grasses for erosion control since their fibrous root systems are able to hold on to soil particles quite effectively.

The first bit of information is that there are cool season grasses and warm season grasses.  Warm season grasses germinate in the spring and, since they are heat and drought tolerant, are generally green throughout the spring and summer.  They  begin turning brown in the fall and remain so throughout the winter.  Cool season grasses germinate in the fall and are green and growing throughout the winter and spring, but die back in the heat of summer. What category do you think Inland Sea Oats is in?

So if you are wanting some type of grass cover throughout the year, you might consider a rotation of warm season and cool season grasses to help stabilize the soil.
This previous answer deals  with grasses in East Texas and has several examples of warm and cool season grasses.( Note that Inland Sea Oats should be in the cool season category.)

Contact the Dallas County office of Texas AgriLife Extension for help in selecting the best species to use in you area.

You might want to check out hydromulching as a method of preventing your seed from washing away.

 

More Grasses or Grass-like Questions

Assessment of Turffalo buffalograss
June 26, 2009 - Hi, I'm in the process of planning what type of turf to get for a new home in NW Austin. Turffalo/Tech Turf has showed up as a great possibility and I saw some mention of it back on March 05, 2008...
view the full question and answer

Need some help with a Buffalo grass planting in Salado, TX
October 23, 2009 - Recently we planted buffalo grass sod in the spring of 2007. During the summer I had a problem with barnyard grass due to a lot of rain. During 2008 I had a problem with nut grass. I had been advise...
view the full question and answer

Native bamboos from Scroggins TX
December 16, 2012 - Can you please recommend a NATIVE bamboo for NE Tx? We live in the Piney Woods in a lake community.
view the full question and answer

How does Habiturf spread from Walburg TX
May 19, 2014 - How does HabitTurf spread? - by seed only? - when/how often must you let it go to seed to insure a permanent stand?
view the full question and answer

Curvularia blight in buffalograss in Kansas
March 05, 2009 - Our buffalo grass is infected with a fungus called curvularia. How can we treat it?
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center