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
2 ratings

Tuesday - October 02, 2007

From: Plano, TX
Region: Southwest
Topic: Propagation
Title: Prosopsis velutina (velvet mesquite), Larrea tridentata (creosote bush), rain smell
Answered by: Nan Hampton

QUESTION:

I am an El Paso native living in Plano TX. I terribly miss the smell of rain in El Paso and have learned that this smell is due to the velvet mesquite tree and also the creosote bush, among other things. I wanted to know if these were native enough to survive in Plano, and if planting was recommended. If you have more information on what vegetation causes the wonderful smell of rain in El Paso and how I can duplicate it in my yard, I would appreciate it. Thanks.

ANSWER:

Prosopis velutina (velvet mesquite) is native to the desert areas of California, Arizona, Mexico and New Mexico—but obviously "leaks" over into Texas near El Paso. An info sheet from the AHS (American Horticultural Society) states that it does well in the USDA Plant Cold Hardiness Zones of 7-9 and the AHS Plant Heat Zones of 10-7. Plano, in zone 8 for USDA and 9 for AHS, falls well within those ranges. The range for Larrea tridentata (creosote bush) is USDA 8-11 and AHS 12-8, so it also falls within the range of Plano for temperature extremes. However, soil moisture would probably be the biggest deterrent for success of the two species in Plano since the average rainfall for Plano is 29 inches and the average rainfall for El Paso is about 9 inches. As a possible substitute, another mesquite, Prosopis glandulosa (honey mesquite), is native to the Plano area. I'm not aware, however, that it is noted for its pleasant smell after a rain. You should be aware, also, that farmers and ranchers often consider mesquites noxious weeds (even though they are native) and spend a lot of time trying to keep them under control.

In addition to the volatile oils from plants, a big contributor to the distinctive smell that comes after rain is soil bacteria. You should certainly still be able to experience this smell in Plano.

Mr. Smarty Plants has been assuming that you are talking about the distinctive smell that follows a rain, but people also report a unique smell that comes right before a rain. The smell BEFORE the rain has been attributed to a chemical called Petrichor, or in chemical terms—2-decanone. The chemicals that are constantly being volatilized and released from trees and other plants can be absorbed by rocks. The increase in humidity right before a rain has the effect of releasing these chemicals from the rock and creating the smell. Velvet mesquite and/or creosote bush must have this chemical in their makeup if they are contributing to the before-rain smell.

 

 

More Propagation Questions

Propagating agarita from berries in Leakey TX
August 09, 2010 - I would like to pick the berries off my agarita and plant them in other areas. When can I plant the seeds and do I need to prepare or dry them first? What is best way to plant in ground? thanks
view the full question and answer

What kind of alcohol to use with Passiflora seeds?
March 12, 2010 - Hi, I read a question and answer related to gernmination of passiflora incarnata. You recommended a 5% alcohol/water solution to soak the seeds prior to sowing. I just want to make sure that you are...
view the full question and answer

Propagation by seed of Texas Mountain Laurel
September 20, 2008 - I just harvested a grocery bag full of Texas Mountain Laurel seed pods. I want to cast them out in a field and wooded area near NW Austin. Is it best to leave the seeds in the pods or remove the pod...
view the full question and answer

Plants for elementary school grow lab in New York
March 14, 2007 - What can we grow in a grow lab in our elementary school library from seed now that will bloom by June or what interesting looking established plants can we put in this grow lab that will have meaning ...
view the full question and answer

Transplanting of yucca plants
May 26, 2006 - We have several Arkansas Yucca plants in our yard that we want to transplant to a plant bed. How do we do that?
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
© 2014 Lady Bird Johnson Wildflower Center