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
1 rating

Wednesday - May 09, 2007

From: Austin, TX
Region: Southwest
Topic: Non-Natives
Title: Thinning of non-native rosemary
Answered by: Nan Hampton

QUESTION:

I live in NW Austin and have a very large rosemary bush that is having problems this season. We trimmed the bush in early March because the plant was getting too large for the space. It is roughly 3 feet deep by 7 feet wide. It has small purple flowers that bloom on it in the early spring, so I'm not sure which variety we have. The bottom of the plant is basically 10-12 inches of sticks. The new growth is coming in at the top of the plant, but underneath looks really terrible. I assume, eventually, the top growth will cover the ugly parts below, but I'd like to have a healthy plant again. Any suggestions? (I did notice a spider web in the base of the plant yesterday, what pesticide would be best to use?)

ANSWER:

Rosemary (Rosmarinus officinalis) is an introduced species from the Mediterranean region that has been used extensively over the South for landscaping. Since the Wildflower Center's focus and expertise is in plants native to North America, rosemary isn't really in our purview. We can tell you, however, that it sounds as if your plant needs to be thinned considerably to regain its health. Many plants will not produce new growth from old, hard wood at all, some only form the end of pruned wood. It sounds like that is what is happening with your plant. You can read more about its care from The Backyard Gardener.

Concerning the spider web in your plant, spiders in general are good news for gardeners since they trap and eat insects that may be injurious to your plants. Mr. Smarty Plants doesn't see a need for a pesticide to kill spiders.


 

 

More Non-Natives Questions

Non-native, invasive Arctium minus in New York
June 13, 2006 - For as long as I can remember, my family has been picking and eating a wild plant which we and other Italian families call " cardoons". I've often heard to it referred to burdock but no one knows t...
view the full question and answer

Non-native crape myrtle resistance to deer from Annapolis MD
April 06, 2013 - Is Crape Myrtle tree resistant to deers? Thank you.
view the full question and answer

Care for non-native cat palm
November 18, 2010 - Purchased 3 new cataractarum palms-3ft. high for indoors--how can I know when to water or how often?? I am from Canada & in Naples Florida for 6 months--I am a novice to these plants
view the full question and answer

Controlling seeding of non- native, invasive Paulownia from Fayetteville TN
August 17, 2012 - My husband planted a Paulownia tree against my advice about eight years ago. This summer it has huge seed pods. How do I keep the seeds from invading the wooded area of our property?
view the full question and answer

Japanese Wineberry in Maryland
July 16, 2014 - Hello, we were at Cunningham Falls in Maryland and I can not identify this plant. If you could I would greatly appreciate it, thank you. It looks like a raspberry but the berries are inside small leav...
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