En Español

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
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

Time of year to plant Texas Mountain Laurel in El Paso, TX
June 10, 2013 - When is the best time of year to plant a Mountain Laurel tree in El Paso?
view the full question and answer

Growing Evergreen sumac in clay soil of Texas
August 19, 2011 - I'm in need of a fast growing evergreen screening shrub/small tree. I'm considering the Evergreen Sumac but before I go further I need to know if this plant will thrive and remain evergreen in the D...
view the full question and answer

Privacy screen for Sedona AZ
August 02, 2013 - I live In Sedona Az. A builder just built a house next to my house and the new house is ugly to look at. What plant or tree would grow fast and reach 18 foot in height fast. It can be about 5 to 6 foo...
view the full question and answer

Need replacements for old arborvitaes destroyed by snow and ice in Reisterstown, MD.
February 07, 2011 - Our big old arborvitaes have been destroyed by snow and ice. Rather than a fence we would like to use plants/bushes for privacy. We live in zip 21136. This would extend all across the back property l...
view the full question and answer

Transplant rootbound tree now from Kerrville TX
June 10, 2012 - I purchased a Blanco Crabapple tree. Should I plant it now or wait until Fall? (It is currently rootbound.) Second question: Our Mountain Laurel has a dead trunk and one trunk has already died. I c...
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 | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center