En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Removing grassy weeds from cactus garden in Corpus Christi TX

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

Tuesday - May 07, 2013

From: Corpus Christi, TX
Region: Southwest
Topic: Pests, Cacti and Succulents
Title: Removing grassy weeds from cactus garden in Corpus Christi TX
Answered by: Barbara Medford

QUESTION:

How do you get grassy weeds out of a cactus garden? I don't want to use roundup around the cacti? Can you recommend a herbicide that won't harm the cactus?

ANSWER:

Like kissing a porcupine, very carefully. Okay, sorry, we'll get serious. First rule, NO SPRAYS. Whatever you read on the label about how safe an herbicide is, it is not safe to spray it. The spray can drift or simply fall out of the air somewhere you did not want it. If, indeed, what you have is grassy weeds, that is, monocots, with long slender leaves that have parallel veins in them, there are specific herbicides for monocots. But you still don't spray it. It probably wouldn't kill the cactus if it drifted over onto it, but it wouldn't do the cactus any good, either. Try to find a bottle of liquid monocot herbicide. And remember your lawn is probably a monocot grass, so don't get careless with the bottle, either, Get a long-handled artist's brush, a cheap one, because you will have to throw it away. Dip the brush into the liquid monocot killer, and then paint the grasses. The nearer you can get down into the root area of each grass, the better, because it is the root you are trying to kill.

Alternative, or perhaps supplemental, method. Get what we used to call a sharp-toed hoe. This was a regular, long-handled hoe, but the blade was triangular with a sharp point. Surely, this is still around in hardware and garden supply stores. Remembering to protect your hands with leather gloves, and your body with heavy clothes, dig out as much root from each weed as you can and remove it, with the hoe. Don't leave it there, because many grasses have stolons, or underground stems, from which new plants can grow. After that, keep a close eye on the patch of weeds, treating anything that pops up with the herbicide or hauling it out with the hoe.

And we think the job should be given to whoever had the idea for a cactus garden.

 

More Cacti and Succulents Questions

How can I eradicate 20 acres of cactus?
April 28, 2010 - Cactus eradication. I have about 20 acres that are covered to the point that it is not safe to walk on the property. What can I do? Are there classes out there for eradication?
view the full question and answer

Replanting a blue agave in Rio Rancho NM
January 11, 2010 - I have acquired a Blue Agave, approximately 4-5 ft high. It still appears quite healthy. It was used over the holiday season for display purposes in a liquor store. Unfortunately, the root ball has be...
view the full question and answer

Transplanting young Nolina texana plants
August 05, 2011 - Mr. SP, I am looking for information relating to transplanting some young Nolina texana. Esp. the best time of the year and whether to replant directly in the ground or .. Thanks,
view the full question and answer

Need advice about an agave that didn't survive the winter in Myrtle Beach, NC.
March 09, 2011 - I live in Myrtle Beach, S.C. bought an agave big last summer and it died in the winter. Some green is showing on the bottom should I cut it all down because the whole top is dead. Thank you
view the full question and answer

Repotting non-native Agave ghiesbreghtii from Spring TX
June 03, 2012 - I've recently purchased an Agave ghiesbreghtii, and will need to re-pot it soon. I have some cactus soil mix as well as a few rocks to put in the bottom of its new pot. There seem to be roots comi...
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