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 - April 15, 2014

From: Gray, GA
Region: Southeast
Topic: Problem Plants, Herbs/Forbs, Trees
Title: Why do conifers kill Texas hummingbird sage from Gray GA
Answered by: Barbara Medford

QUESTION:

Why do conifers kill Texas hummingbird sage?

ANSWER:

First, we need to establish some plant identities. We found several websites referring to a salvia as Texas Hummingbird Sage, or Texas Sage or Hummingbird Sage; for instance, this one from Fine Gardening, this one from Seeds of Change or from Dave's Garden,  all of which refer to the plant as Salvia coccinea, which we find in our Native Plant Database as Salvia coccinea (Scarlet sage). There is also a plant in our database referred to as Salvia spathacea (Hummingbird sage). According to this USDA Plant Profile Map, Salvia spathacea is endemic to California; i.e., growing nowhere else in North America. When we check the Plant Profile Map on Salvia coccinea, we find that, while it does grow in a few places in Georgia, it is not reported as growing in Jones County, in Central Georgia.

We are going to put all this confusion down to creative trade names, and say that the best chance for a salvia growing in Georgia being the one you have purchased as Salvia coccinea (Scarlet sage). In this research, we found no indication of a conifer being poisonous to any sage, so let's look a little further.

Growing Conditions for Salvia spathacea (Hummingbird sage):

"Growing Conditions

Light Requirement: Part Shade
Soil Moisture: Moist
Soil Description: Various mesic to slightly moist soils.
Conditions Comments: This perennial is easy to grow and deer proof."

Growing Conditions for Salvia coccinea (Scarlet sage):

"Growing Conditions

Water Use: Medium
Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Dry , Moist
Soil Description: Caliche type, Sandy, Sandy Loam, Medium Loam, Clay Loam, Clay
Conditions Comments: Scarlet sage reseeds easily and will grow in the shade. It has pungent foliage that makes it fairly deer resistant. Periodically trim and deadhead to keep it bushy."

From that, it does not seem that simply shade from a conifer or any other tree would have caused either salvia to die. We do know that the fallen plant material from conifers tends to be acidic, thus influencing the soil beneath them to be more acidic.

Frankly, we can't verify that conifers kill salvias. Heavy shade from a nearby large conifer, the acidity of fallen needles from a conifer or just competition between the salvia and the conifer roots could all affect the outcome. Mr. Common Sense says if you have had this problem in your garden, don't plant salvias under conifers.

 

From the Image Gallery


Scarlet sage
Salvia coccinea

Scarlet sage
Salvia coccinea

Scarlet sage
Salvia coccinea

More Trees Questions

Quaking Aspens in Albuquerque
October 25, 2010 - How do quaking aspens fare in north east Albuquerque?
view the full question and answer

Galls on live oak tree in Austin
December 12, 2013 - I live in Austin, and have a 13 year old live oak in my yard. It has developed little spheres, kind of like green peas, on the underside of the leaves. What is it? Is it harmful? Is there somethin...
view the full question and answer

Mountain laurel with new leaves or new seed pods
May 11, 2008 - Each spring, my Texas Mountain Laurel seems to put new leaves only on selected branches (actually trunks), and put on seed pods on other trunks. It seems to be mutually exclusive: trunks with new seed...
view the full question and answer

Which plants are resistant to dog urine in Ashmore, IL??
May 21, 2012 - Which native plants are resistant to dogs urinating on them?
view the full question and answer

Looking for a tree not toxic to horses in Pennsylvania.
May 26, 2009 - I'm sending a tree as a gift and I need to know what I can get that is non toxic to horses. Can you please suggest a few.
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center