Host an Event Volunteer Join Tickets

Support the plant database you love!

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.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
8 ratings

Tuesday - October 25, 2011

From: Austin, TX
Region: Southwest
Topic: Compost and Mulch, Watering, Drought Tolerant, Erosion Control, Grasses or Grass-like
Title: Water eroding corner in Austin
Answered by: Barbara Medford

QUESTION:

I live close to the Wildflower Center. My yard slopes - as do my neighbors' yards to one corner in my yard. The result is constant moisture in one corner. The rest of the yard is caliche, rocks (many rocks) and little soil. What can I put in the damp area that would be evergreen or flower all the time?

ANSWER:

Bet you still believe in the Easter Bunny, too, don't you? Evergreen and ever-blooming and survival in our alkaline soil and awful drought? Isn't going to happen, not that we wouldn't like to be able to provide you with the name and address of such a plant, if there were one. Let's call it a "Whatzit," and if it existed we would likely be the Lady Bird Johnson Whatzit Center.

Obviously, we are familiar with your area, since we are there, too. We know this is not rainwater, so it has to be the possibility of over-watering. It sounds a little weird to talk about overwatering in the midst of no rain and water rationing, but we have had several questions in which that has been our diagnosis. If you are watering, even on designated watering days, that water is draining naturally to that corner. Rather than try to find native plants that will do well in that extra water, we would suggest you make some changes in the soil to catch and use that water for plants that will like the area.

The best thing you can do is build a raised bed there, using good, well-draining amendments to make the soil more hospitable to soaking up water that flows there, and using it on plants suited to drought and heat. We  addressed a similar situation in a previous question, which you might find informative.

Another question, actually from the Austin area, answers several of your questions, and has another excellent link on raised beds. To repeat ourselves somewhat, the best plants for an eroding area are native grasses. The last Mr. Smarty Plants answer we referred you to lists some native plants for Central Texas. One more possibility that occurs to us, depending on how much sun you have in in the area, is Leucophyllum frutescens (Cenizo). This is a medium-size shrub that comes very close to your specified plant in being evergreen and, under the right conditions, can bloom most of the year. Follow the plant link to our page on this plant in our Native Plant Database. If you choose to go this route, get your area amended, bordered, if necessary, and get your shrub(s) when the weather is cooler. The plant definitely needs good drainage, so don't forget compost and decomposed granite for the amendments, and don't fertilize. This is one of those plants that really doesn't like fertilizing.

 

 

From the Image Gallery


Cenizo
Leucophyllum frutescens

More Erosion Control Questions

Erosion for check dam in San Antonio
February 13, 2009 - What are the best trees for a shallow soil wind break in San Antonio? I am building a check dam (maybe 2' deep by 20' wide tall) over a shallow limestone gully to slow the erosion. the gully drai...
view the full question and answer

Hillside Erosion in Pace FL
July 17, 2015 - I have a hillside that slopes down about 10 feet to a spring fed pond. The pond drains into Escambia Bay. We have 2 dams with culverts to control the flow of water. Last year during a torrential ra...
view the full question and answer

Chesapeake Bay Erosion Control from White Stone VA
January 14, 2012 - Native Wetland Plants for Chesapeake Bay Erosion Control -- I have a wooded lot (pine and hardwoods)leading to 4-5 ft. wide flat shoreline edged with riprap. What native wetland plants survive salt wa...
view the full question and answer

Non-allergenic landscape in Fairfield, CT
April 18, 2009 - I live in Fairfield, CT and need to have a non-allergenic landscape. Can you please list plants, ground covers, and trees/shrubs that would be beautiful, and help in this critical situation? The lan...
view the full question and answer

Plantings for sides of retention pond in Willits CA
July 02, 2012 - I am looking for recommendations for ground cover for the outside of embankments which impound wastewater. This is to improve the aesthetics and deter weeds. The slopes are 1V:2H, so if we can avoid...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.