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

Friday - June 29, 2012

From: Prosper, TX
Region: Southwest
Topic: Non-Natives, Pests
Title: Application of sprays to non-native Crape Myrtle from Prosper TX
Answered by: Barbara Medford

QUESTION:

Can applying a systemic insecticide/fungicide combo prevent or limit Crape Myrtle blooms? I have 5 large lavender Crapes that are not blooming or budding yet and this is the first time I have used a systemic on them. Applied it in late May. They do have new growth and are very full.

ANSWER:

 

Lagerstroemia indica (crape myrtle) is native to China, Japan and Korea and is therefore out of the realm of expertise of the Lady Bird Johnson Wildflower Center, home of Mr. Smarty Plants. We are committed to the growth, protection and propagation of plants native not only to North America but to the area in which those grow natively. This is a conservation issue, because plants native to an area will have become accustomed to the soils, rainfall and climate over centuries of experience.

From the United States National Arboretum, here are Questions and Answers on Crape Myrtle. From that article:

"My crapemyrtle is reluctant to bloom. What am I doing wrong?

Crapemyrtles flower most heavily in full, uninterrupted sunlight.  Even an hour of shade during the day will compromise flowering.  Frequent irrigation, lack of heat, and overfertilization promote vegetative growth at the expense of flowering.  In extreme drought conditions or cool, rainy summers, flowering may be delayed until the early autumn."

We also discourage spraying any kind of "...icide" to a plant without clear indications that it is needed.

 

 

 

More Non-Natives Questions

Problems with non-native photinia in Austin
October 07, 2013 - Hi, I live in Cedar Park, TX (Austin Suburb)and have planted a number of Photinia shrubs in various areas of my property. All about 10 months old. The leaves are curling along their length on many...
view the full question and answer

Pruning of frost-damaged non-native Sago Palms in Marble Falls TX
April 18, 2010 - I have several large Sago Palms that have partial frost damage, they are part green and part brown fronds. Should I remove the brown leaves? the center of the leaf is green.
view the full question and answer

Weed prevention in vegetable gardens
September 26, 2007 - Mr.Smarty Plants - I know this isn't your area, but we have a vegetable garden that has been plagued by summertime weeds. Do you have a recommendation for a control plan we could implement during t...
view the full question and answer

Plant for a salt water pool in Australia
September 27, 2011 - What plant is a perfect plant for small areas around a salt water pool?
view the full question and answer

Problems with non-native Bradford pear in Katy TX
April 24, 2011 - Hi. I have a Bradford Pear that I wrapped during the freeze at the base of the trunk during last years freeze. It is about 4.5 yrs old. The base has cracked and the top is dry and lifeless; however, 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