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Can I spray roundup to kill grass around 3-year old crepe myrtles in order to mulch later?

Posted on 3/5/20 at 9:36 am
Posted by TDsngumbo
Alpha Silverfox
Member since Oct 2011
41509 posts
Posted on 3/5/20 at 9:36 am
Would it affect the trees or just the grass? I want to spread mulch around each tree base but before I do I'd like to kill the grass there. Will this affect the trees at all or just the grass?
Posted by CoachChappy
Member since May 2013
32503 posts
Posted on 3/5/20 at 9:42 am to
Spray very lightly. DOnt soak the ground like you would on a fence line.

Also, if you plan to mulch, you don't need to spray at all. Get old news paper and thickly cover the ground around the tree. Wet the newspaper, and apply the mulch
Posted by PillageUrVillage
Mordor
Member since Mar 2011
14725 posts
Posted on 3/5/20 at 9:44 am to
quote:

Get old news paper and thickly cover the ground around the tree. Wet the newspaper, and apply the mulch


This. Cardboard would also work great.
Posted by TDsngumbo
Alpha Silverfox
Member since Oct 2011
41509 posts
Posted on 3/5/20 at 9:44 am to
quote:

Also, if you plan to mulch, you don't need to spray at all. Get old news paper and thickly cover the ground around the tree. Wet the newspaper, and apply the mulch

Never heard of that. Interesting and thank you!
Posted by CoachChappy
Member since May 2013
32503 posts
Posted on 3/5/20 at 9:46 am to
Posted by greygoose
Member since Aug 2013
11434 posts
Posted on 3/5/20 at 9:57 am to
quote:

Can I spray roundup to kill grass around 3-year old crepe myrtles in order to mulch later?


Ha! You can pour round up directly over crepe myrtles. Good luck ever getting rid of them if you ever want to! Those shits refuse to die!
Posted by SSpaniel
Germantown
Member since Feb 2013
29658 posts
Posted on 3/5/20 at 10:03 am to
quote:

Ha! You can pour round up directly over crepe myrtles. Good luck ever getting rid of them if you ever want to! Those shits refuse to die!


Heck, I've cut one down before, dug it up, sodded where it used to be... and a year later... "Hello, remember me?"
Posted by fightin tigers
Downtown Prairieville
Member since Mar 2008
73674 posts
Posted on 3/5/20 at 10:06 am to
You can soak the ground around them and it won't matter. Roundup doesn't work on roots, Roundup works on foliage.
Posted by greygoose
Member since Aug 2013
11434 posts
Posted on 3/5/20 at 10:26 am to
quote:

Heck, I've cut one down before, dug it up, sodded where it used to be... and a year later... "Hello, remember me?"



I've been trying to kill one for years. Cut it to the ground, sprayed herbicide directly on the open cuts. It acts like I used fertilizer! I'm resigned to just cutting it to the ground every year.
Posted by fightin tigers
Downtown Prairieville
Member since Mar 2008
73674 posts
Posted on 3/5/20 at 10:36 am to
quote:

I've been trying to kill one for years. Cut it to the ground, sprayed herbicide directly on the open cuts. It acts like I used fertilizer! I'm resigned to just cutting it to the ground every year.




Use root rot type stuff or even groundclear, but careful with amounts used if near other vegetation you want to keep.
Posted by jpggpj
Chair
Member since Oct 2005
3985 posts
Posted on 3/5/20 at 12:07 pm to
quote:

Would it affect the trees or just the grass?


Roundup will not hurt those trees but make sure it only hits the grass you want to kill and be careful of runoff if the ground is sloped by the tree. If it rains shortly after you spray, you will have the possibility of the rain water spreading the roundup into your lawn.
Posted by Burlee
Memphis, TN
Member since Aug 2006
7324 posts
Posted on 3/5/20 at 3:56 pm to
Will the newspaper trick work under a magnolia tree? Or will the surface roots get compromised by the newspaper?
Posted by gumbo2176
Member since May 2018
15003 posts
Posted on 3/5/20 at 4:26 pm to
quote:

Never heard of that. Interesting and thank you!


I do this in my vegetable garden between the rows all the time. Head to Rouses, get a bunch of cardboard boxes, cut them to fit between the rows and then cover all that cardboard with oak leaves and grass clippings.

Keeps weeds down and the garden has less need for watering since the ground is protected from the direct sunlight evaporating the ground water.
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