En Espa—ol

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
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
7 ratings

Tuesday - September 08, 2009

From: Orange, CA
Region: California
Topic: Grasses or Grass-like
Title: Bioswale in Orange CA
Answered by: Barbara Medford

QUESTION:

Mr. Smarty Plants, I'm looking for plants for a bio-swale in Southern California. Do you have any suggestions for plants that do well in water but can also can handle long dry summers?

ANSWER:

Common swales are typically vegetated with turf grass and are a conveyance tool, basically a grassy stormwater sewer that conveys water as quickly as possible from Point A to Point B. A bioswale differs in that the turf grass is replaced with native prairie vegetation. This will significantly reduce the flow velocity (slow down of the runoff) in the swale’s drainage course. The residence time of the runoff is thus increased, which gives it the time to be stored, filtered, and infiltrated. These processes remove pollutants and suspended solids from runoff.

We found this information on bioswale construction from the USDA, which shows compost tilled into the native soil (clay, in this instance) to facilitate the drainage. These are plants with fibrous roots that will hold in the soil when water is rushing by, help to slow it down, and permit the pollutants in the water to be filtered out. 

Since our suggestions are basically for prairie grasses, you might be interested in reading our How-To Article Recreating a Prairie, which has instructions for time of year to be planting, preparing the soil, planting and caring for the grasses. When you are ready to begin, go to our Native Plant Suppliers section, put your town and state in the Enter Search Location box, and you will get a list of native plant nurseries, seed companies and landscape consultants in your general area who can help you select the right plants for your purpose.

We found eight grasses native to the Orange County area that we believe fit your specifications. Follow the links to each individual plant webpage to learn expected height, season, etc.

Native grasses for bioswale in Southern California

Bromus ciliatus (fringed brome)

Juncus torreyi (Torrey's rush)

Nassella viridula (green needlegrass)

Phragmites australis (common reed)

Schoenoplectus tabernaemontani (softstem bulrush)

Typha latifolia (broadleaf cattail)

Andropogon glomeratus (bushy bluestem)

Muhlenbergia richardsonis (mat muhly)


Bromus ciliatus

Juncus torreyi

Nassella viridula

Phragmites australis

Schoenoplectus tabernaemontani

Typha latifolia

Andropogon glomeratus

Muhlenbergia rigens

 

 

 

 

 

 

More Grasses or Grass-like Questions

Winter expectations for Buffalograss (Bouteloua dactyloides)
October 08, 2007 - I planted some buffalo grass (from seed) in April of this year. Iíve got a nice patch now, though itís starting to brown up some. Iím wondering what to expect from this patch over the winter- will i...
view the full question and answer

Plants for narrow planter boxes in San Antonio
October 02, 2010 - We have a narrow flower planter box in three sections above a french drain in front of our house. The box is about 2 feet high (filled with Gardenville soil) above a french drain covered with filter ...
view the full question and answer

Native lawn replacement for shady areas in Austin
September 11, 2013 - Our front lawn was totally destroyed this summer during some remodeling construction. I am interested in replacing it with native grasses, but we have several oak trees that keep the area fairly shady...
view the full question and answer

Wildlife garden for Austin
May 19, 2013 - I am trying to make my backyard more wildlife friendly. I have pecan trees for the canopy and some understory shrub/trees like rough leaf dogwood and redbud. I am having a really hard time finding sui...
view the full question and answer

Need Native Cover Crop in Seguin, TX
October 11, 2010 - Is there a native winter cover crop that would control erosion until spring vegetation takes over?
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