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

Control of Paulownia tomentosa from Westminster MD
October 28, 2011 - I have heard that there is a type of herbicide that is to be applied to slashes made in the outer layer of invasive trees such as Paulownia. This type of application is reputed to prevent the little ...
view the full question and answer

Ailing non-native red tip photinia
June 05, 2009 - My red tips look like they are brittle and the leaves are spotted. What do I do?
view the full question and answer

Problems in non- native weeping willow in Spokane WA
June 21, 2010 - My wife and I have a weeping willow tree that has done well for two years. This year some of the branches are loosing their leaves in late spring in Spokane, WA. I though it was from the wind but ha...
view the full question and answer

Identification of red lily-like blossom in Austin, TX
September 21, 2012 - Rain at last in Austin! The rain lilies are up, but wait, what on earth is this? Lily like, 6 petals, but a cluster of 6 stalks w/blood red blooms slightly larger than our rain lilies - Off under a ...
view the full question and answer

When to plant bermudagrass in East Texas
July 17, 2009 - When to plant Bermuda grass in East TX, Center, Nacodoches, Lufkin and Center area?
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