Contact Us Host an Event Volunteer Join

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
1 rating

Sunday - April 01, 2012

From: Hillsborough, NC
Region: Southeast
Topic: Poisonous Plants, Shrubs
Title: Will Calycanthus floridus (Eastern sweetshrub) grow near black walnut trees?
Answered by: Nan Hampton

QUESTION:

Will Calycanthus floridus survive if planted near Black Walnut trees? If not, can you recommend a similar bush that will?

ANSWER:

One comment on the Dave's Garden page from "gonedutch" in Fairport, NY says that Calycanthus floridus (Eastern sweetshrub) tolerates growing near black walnuts, but I could find no mention of Eastern sweetshrub in either of the two articles I found about plants that are tolerant of walnut/juglone toxicity:

So, I suppose it is possible that Eastern sweetshrub is tolerant of juglone, but I can't say for sure.

However, here are several shrubs native to North Carolina that are listed as tolerant of growing near black walnuts:

Lindera benzoin (Northern spicebush)

Cercis canadensis (Eastern redbud)

Cornus florida (Flowering dogwood)

Asimina triloba (Pawpaw)

Ceanothus americanus (New jersey tea)

Chionanthus virginicus (White fringetree)

Physocarpus opulifolius (Atlantic ninebark)

Rhus aromatica (Fragrant sumac)

Rhus glabra (Smooth sumac)

Corylus americana (American hazelnut)

 

From the Image Gallery


Northern spicebush
Lindera benzoin

Eastern redbud
Cercis canadensis

Flowering dogwood
Cornus florida

Pawpaw
Asimina triloba

New jersey tea
Ceanothus americanus

White fringetree
Chionanthus virginicus

Common ninebark
Physocarpus opulifolius



Smooth sumac
Rhus glabra

American hazelnut
Corylus americana

More Poisonous Plants Questions

Is Spanish moss (Tillandsia usneoides) poisonous to pets? Probaly not.
September 08, 2008 - Is Spanish Moss poisonous to pets? I have a dog which will eat anything.
view the full question and answer

Spots on leaves of sevenleaf creeper in Austin
November 14, 2009 - Have 3 seven leaf creepers that are planted in mostly shade. In Sept & Oct 2009 all 3 plants had dried up leaves which fell off; however, all three plants grew new leaves when we got rain and are com...
view the full question and answer

Are dogwood trees poisonous to horses?
April 26, 2009 - Are dogwood trees poisonous to horses?
view the full question and answer

Removing Mountain Laurel Seed Pods from Austin
August 14, 2012 - Is it best to remove seed pods from Mt. Laurel or leave them on the tree?
view the full question and answer

Identification of plant with orange sap that glows at night
June 06, 2012 - I was just pulling up a plant and noticed that its sap was a kind of orange then I noticed it glowing orange at night. What kind of plant is this and is it dangerous?
view the full question and answer

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