Host an Event Volunteer Join Tickets

Your gift keeps resources like this database thriving!

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?

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
Not Yet Rated

Friday - September 18, 2015

From: Butler, PA
Region: Mid-Atlantic
Topic: Groundcovers, Grasses or Grass-like, Herbs/Forbs
Title: Low Groundcovers for Pennsylvania
Answered by: Larry Larson

QUESTION:

Hi Mr Smarty Plants, I'm looking for a low growing grass or ground cover for an area that is between my neighbors horse fence and mine it is about 2 feet wide 30 ft long. It is impossible to mow and a pain to weed whack. Requirements : clay soil, mostly full sun, low maintenance, low growing(no higher than 2 ft or so (preferably lower), fast growing, not toxic to horses, native, I am in western pa. Thank you :))

ANSWER:

Wow – That’s a bunch of requirements, but we can make some reasonable suggestions.  One of my favorite sources is to use the Wildflower Centers selection of Special Collections.  One of these has been specifically built for Pennsylvania.

The power of using these collections is that they can be sorted for several attributes.  Within your requirements probably one of the most common that will also reduce the list is the height.  Selecting 0-3 feet high – there are 40 possibilities left, which is a reasonable set to start reading.  When I reviewed these – several were deleted for having poisonous parts [we can never guarantee them all!] and only a few listed clay soils as an acceptable base.  You are most welcome to sort and read yourself;  Here are the ones that caught my attention as fitting most of your requirements.

Interestingly, there were a few grasses that came through this inspection.
Grasses, most prefer dry sandy soils: 
Bouteloua curtipendula (Sideoats grama) is the only grass that lists “clay soils”,  Koeleria macrantha (Prairie junegrass) and Sporobolus heterolepis (Prairie dropseed) look like they may adapt,  

There were a small number of low herbs and groundcovers that accept clay soils, consider:
Conoclinium coelestinum (Blue mistflower),   Coreopsis lanceolata (Lanceleaf coreopsis),   Gaultheria procumbens (Eastern teaberry)Lobelia siphilitica (Great blue lobelia)Phlox divaricata (Wild blue phlox).  

 

From the Image Gallery


Sideoats grama
Bouteloua curtipendula

Prairie junegrass
Koeleria macrantha

Prairie dropseed
Sporobolus heterolepis

Eastern teaberry
Gaultheria procumbens

Blue mistflower
Conoclinium coelestinum

Lanceleaf coreopsis
Coreopsis lanceolata

Great blue lobelia
Lobelia siphilitica

Wild blue phlox
Phlox divaricata

More Herbs/Forbs Questions

Shade ground cover under honeysuckle from Wichita KS
February 21, 2012 - Hi! I know this is a bit odd, but I am trying to find a nontoxic, good ground covering plant that can live in the shade while competing with the roots of a whole bunch of honeysuckle. I have a few ide...
view the full question and answer

Stabilizing a lakeside slope from Bracey, VA
May 24, 2012 - We are trying to beautify and stabilize a relatively large lakeside steep slope with a southern exposure in central Virginia. The soil is characterized by red clay and shale rock. How can we turn this...
view the full question and answer

Are Viguiera dentate leaves toxic to dogs?
November 26, 2014 - Many dogs on the Turkey Creek Nature Trail in Emma Long Metropolitan Park love to snack on the leaves of the Viguiera Dentata plants. The leaves SEEM to be harmless. I am writing to request informat...
view the full question and answer

Non-blooming Hypericum in Eastern Pennsylvania
June 14, 2009 - I purchased a St. Johnswort about 3 years ago. I has never bloomed. It is alive & well. I know this since it has started to spread shoots. Is there a trick to this one? Occasionally something I plant ...
view the full question and answer

Ground cover under Spruces from West Chester PA
December 06, 2012 - Trying to get a native groundcover (or any grass/wildflower/fern) planting established under a small stand of spruces. Established stand (30+ years old), so lots of needles on ground. Just about tot...
view the full question and answer

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