En EspaŅol

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
Not Yet Rated

Tuesday - March 26, 2013

From: Cambridge, MD
Region: Mid-Atlantic
Topic: Problem Plants, Shade Tolerant, Ferns, Grasses or Grass-like, Herbs/Forbs
Title: Plants to grow in shady area near a pecan tree in Maryland
Answered by: Nan Hampton

QUESTION:

I live on the Eastern Shore of Maryland. I have planted only natives in my front lawn. My backyard, which sports a pecan tree, fir, fig tree, and others I can't identify is dirt, just dirt. I have tried local grass seeds. Nothing takes. Do you have any suggestions?

ANSWER:

I think your problem is twofold:  1) shade and, perhaps, 2) the allelopathic effect of the juglone in the pecan tree.  Juglones are chemicals produced by trees in the Family Juglandaceae (Walnut Family) that are capable of inhibiting the growth of some, but not all, other plants. You can see lists of plants susceptible to juglones and those tolerant of juglones from Ohio State University.  (Be aware that not all the plants on their list are native to Maryland or even to North America.)  It appears that the level of  juglone in Carya illinoinensis (pecan) is less than in walnuts.  Grasses, in general, seem to be tolerant of juglones.  In fact, there have been studies showing that bermudagrass and tall fescue are allelopathic to pecan seedlings!

Here are three grasses and a sedge that occur in Maryland and will grow in the shade or part shade.  I have personal experience with inland sea oats growing quite happily under my walnut tree in Texas and suspect the other three species will also be tolerant of your pecan's juglones.

Chasmanthium latifolium (Inland sea oats)

Elymus canadensis (Canada wildrye)

Muhlenbergia schreberi (nimblewill)

Carex blanda (eastern woodland sedge)

Here are a few herbs and a fern from the Ohio State University list that are native to Maryland and will grow in the shade or part shade:

Arisaema triphyllum (Jack in the pulpit)

Dicentra cucullaria (Dutchman's breeches)

Sanguinaria canadensis (Bloodroot)

Trillium species such as Trillium grandiflorum (Large-flower wakerobin)

Tradescantia virginiana (Virginia spiderwort)

Viola canadensis (Canadian white violet) and Viola pedata (Birdfoot violet) and other violets

Osmunda cinnamomea (Cinnamon fern)

For all the species named above, you should check the other characteristics shown under GROWING CONDITIONS on the species page to determine if they match those of your site.

 

From the Image Gallery


Inland sea oats
Chasmanthium latifolium

Canada wild rye
Elymus canadensis

Nimblewill
Muhlenbergia schreberi

Eastern woodland sedge
Carex blanda

Jack in the pulpit
Arisaema triphyllum

Dutchman's breeches
Dicentra cucullaria

Bloodroot
Sanguinaria canadensis

White wake-robin
Trillium grandiflorum

Virginia spiderwort
Tradescantia virginiana

Canadian white violet
Viola canadensis

Birdfoot violet
Viola pedata

Cinnamon fern
Osmunda cinnamomea

More Shade Tolerant Questions

Native evergreen for shade
August 28, 2008 - Hi, I am looking for a plant that is evergreen (or semi evergreen), native to central Texas, and shade tolerant. This is for a Wildscape area in San Marcos. Do you have any suggestions? Thanks!
view the full question and answer

Shade-loving native plants for South Carolina
January 08, 2008 - I am looking to incorporate a native plants section in my backyard. Shade seems to be a limiting factor in some parts, especially where I would look to create a natural hedge bordering my neighbor's...
view the full question and answer

Erosion Control with perennials for a shady Dallas bank
July 25, 2013 - Thank you for your help with turf or perennials on a shaded bank, 4000 sq ft, for the Dallas area that has good roots, grows in semi shade to shade, is on a steep bank so cannot mow, and flowers the l...
view the full question and answer

Groundcovers for area under blue spruce in Colorado
August 10, 2012 - I have a 40 ft blue spruce limbed up 6 ft in my yard on the west in Greeley, CO (50 mi N Denver, zone 4 or 5). It gets some sun underneath in the later afternoon and evening. Can you suggest 4 to 5 ...
view the full question and answer

Annabelle hydrangeas blossoms drooping to ground in Wilmette, IL
April 10, 2011 - I have a row of Annabelle Hydrangeas that become very heavy and droop over the entire width of the bed. I would like to know what I can use for support so that they will stand up and allow me to plan...
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