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?


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

Monday - July 12, 2010

From: Fredericksburg, TX
Region: Select Region
Topic: Compost and Mulch, Diseases and Disorders, Shrubs
Title: Death of mature Eve's necklace in Fredericksburg, TX
Answered by: Barbara Medford


A friend mentioned his mature Eve's necklace had died this year. The next day I walked past my own mature Eve's necklace(about 5 years old)and it was dead! What could have happened? Thanks.


This falls in the category of "what's the matter with my dead plant?" It could have been anything from misdirected herbicide intended for lawn weeds to bad drainage to old age. It is very likely that the unexpected low temperatures we had in Central Texas last winter could be the culprit. All we can do is tell you what conditions the plant flourishes under and say that, if it wasn't freeze damage, whatever you did wrong, next time don't do it. 

Styphnolobium affine (Eve's necklacepod) has a light requirement of part shade. We consider sun to be 6 or more hours of sun a day, part shade to be 2 to 6 hours of sun per day, and shade to be less than 2 hours of sun per day, so both plants could have been under- or over-exposed to sunlight.  Please note that this plant must have good drainage to survive. It's a good idea to prepare the hole in advance, working in some compost, leaf mould or other organic material to contribute to good drainage. If good drainage is not provided, the plant will typically get chlorotic, leaves turning pale green, and fail to thrive, or even to survive. It is a perennial, deciduous plant, growing from 12 to 36 feet in height. It should be grown alone; if there are larger plants nearby, it will become spindly. 

From our Native Plant Image Gallery:

Styphnolobium affine

Styphnolobium affine

Styphnolobium affine

Styphnolobium affine



More Diseases and Disorders Questions

Need help with Wheeler's Dwarf Pittosporum
September 02, 2015 - We have about five Dwarf Wheeler Pittosporum plants. All of them are mature and were doing well. I was on vacation for a week or so and when I came back I saw of each of them is plant 90% dead. The d...
view the full question and answer

Effect of heavy rains on Lindheimer Muhly
May 04, 2015 - It is April 2015, in San Antonio we've had very heavy rains recently. My Lindheimer muhly, which was looking beautiful, has now turned brown all over. Is this normal or is this a problem?
view the full question and answer

Century plant leaves falling over from San Antonio
April 10, 2013 - Have a large century plant about % feet tall. The leaves are falling over. Can you tell me what to do to avoid this.
view the full question and answer

Disease-resistant squash varieties for Central Texas
February 03, 2008 - Can you give me names of some disease-resistant summer squash varieties available in Central Texas?
view the full question and answer

Tan, rough, fan-shaped growth on mountain laurels
July 01, 2014 - A tan rough fan-shaped "something" is growing at the end of the mountain laurel branch where the flowers would be .. what is it and can it harm the plant?
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
© 2015 Lady Bird Johnson Wildflower Center