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

Thursday - February 23, 2012

From: Austin, TX
Region: Southwest
Topic: Grasses or Grass-like
Title: Lawn fertilizer in Austin
Answered by: Barbara Medford

QUESTION:

My lawn person wants to spread granulated spring fertilizer on my lawn. Problem is I have a very old Live Oak tree that I do not want to kill. What should I avoid spreading on my lawn to prevent toxic reaction for my beautiful Live Oak?

ANSWER:

If this is "weed and feed," please, NO. Consider: there are two kinds of plant killers that can be included in a granulated fertilizer. One kills only monocots, which grasses are. The other kills dicots or wide-leaf plants. If you use the monocot killer, you will kill your grass. If you use the dicot killer, what kind of plant do you think that tree is? Right, a dicot, wide-leaved. Of course, many of the weeds in your grass are dicots, that's why that kind of herbicide is often used on lawns, but just consider how many other dicots that you have lovingly planted and watered are in the same area. Those granulated fertilizers, whatever is in them, will dissolve in the water of rain and sprinklers and be taken up in the water by the roots of the plants. The tree will use its vascular system to spread that chemical-laden water up through the entire tree. Sure, it may be a small amount in a big tree, but it also can accumulate. It might not kill the tree on the spot, but over time, it is not good for the tree.

 

More Grasses or Grass-like Questions

Identifying native grasses in DeSoto TX
September 15, 2009 - I want to plant my 1.5 acre yard in a native grass; there are already some grasses growing there. How do I identify this grass? Thanks
view the full question and answer

Native grass mix suitable for Houston
December 10, 2009 - Do you have a native grass mix that is appropriate to the Houston area- or will the one you have developed to this point work as well here as it does in Central Texas? If not, when will you begin to ...
view the full question and answer

Habiturf for Round Rock TX
March 17, 2013 - Topic Habiturf. We have just aerated our lawn. We were planning on throwing out bermudagrass seed. We already have bermudagrass as well as many weeds in the lawn especially the blue stem clump grass w...
view the full question and answer

When and how to mow native grass in Texas
February 27, 2010 - We live on a ranch near Kerrville. The grass is sparse KR, purple three-awn and some Texas wintergrass. How and when is the best way and time to mow this native grass?
view the full question and answer

Trimming inland sea oats from Waco TX
January 30, 2013 - Re: Inland Sea Oats and trimming back in early spring "It passes through most of winter a soft brown, but becomes tattered and gray by February, a good time to cut it back to the basal rosette." ...
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