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

Wednesday - December 02, 2009

From: Marble Falls, TX
Region: Southwest
Topic: Non-Natives, Planting
Title: Hardiness of Euphorbia milii from Marble Falls, TX
Answered by: Barbara Medford

QUESTION:

What is the hardiness of euphorbia mili, crown-of-thorns?

ANSWER:

We answered and then corrected our answer on a very similar question just today. From that, here is the situation on the hardiness of Euphorbia milii, Crown of Thorns:

"Euphorbia milii is only hardy from Zones 9b to 11. Central Texas is generally Zone 8a. The plant itself would be threatened by a hard frost in this area, and certainly a plant with its roots exposed in a pot would be even more likely to be damaged by cold weather. Euphorbia milii should be treated as an indoor potted plant over the winter. Here is more information on this plant from Floridata and pictures from Google." 

This plant is actually a native of Madagascar, and out of our range of expertise at the Lady Bird Johnson Wildflower Center, where we deal only in plants native not only to North America but to the area in which they are being grown. 

Read our previous answer in full.

 

More Planting Questions

Planting bluebonnets on UT Campus in Austin
January 07, 2012 - Hello! I am with a student organization on the University of Texas campus. Walking around campus, I have noticed the lack of the state flower of Texas, the bluebonnet. Our organization is hoping ...
view the full question and answer

Chlorosis in tropical milkweed and asclepias tuberosa
May 18, 2008 - I planted both tropical milkweed and asclepias tuberosa. Both are chlorotic and the native milkweed has brown upturned leaves. Could it possibly be too much water? Or what?
view the full question and answer

Spot for communion and tree planting on Long Island
February 20, 2012 - I'm planning to combine my son's communion and a tree planting memorial for his uncle/godfather that passed on Valentine's Day. I'm looking for a venue on Long Island that can combine both on May ...
view the full question and answer

Trees starting to die in subdivision in Hutto, TX
May 31, 2012 - I live in Hutto Tx, in a subdivision where everyone has the 2 trees planted in the front yard. My trees have started to die, and I want to find out what kind they are to find a solution
view the full question and answer

Establishing wildflowers on a slope in Virginia
August 18, 2012 - From Roanoke Virginia. I have a steep bank rising from one side of my driveway to woods above. Different areas vary from full sun, to half day shade. It is possible to carefully walk/stand on it, we a...
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center