Can you use RoundUp right under a tree ?

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Old 05-05-20, 06:03 AM
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Can you use RoundUp right under a tree ?

I am in the process of creating a very clean looking area - kind of Zen garden with stones, arrangements etc...
I currently have grass growing and a few small trees.
Once I physically remove the grass and place the stones and a few boulders around the trees ... I know that even with the landscape fabric I will be getting some weeds and grass coming through.
For the purpose of maintenance - is it OK to use RoundUp or another general broad spectrum grass and weeds herbicide ?
It's my understanding that RoundUp works by penetrating the green leaves and kills the roots from within the plant....and it is virtually inactive when sprayed directly into the soil.
So I am guessing that if I am very careful NOT to overspray any of it onto the green parts of the trees - but only wet the grass - I will be able to maintain this "desert" look

Just want to confirm there is no risk of damaging the trees.

Thank you !
 
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Old 05-05-20, 06:08 AM
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It may depend on the age/size of the tree but I wouldn't risk it.
 
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Old 05-05-20, 06:48 AM
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It should not be a problem.
Just use a sprayer with a narrow stream and do not use it on a windy day.
 
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Old 05-05-20, 06:55 AM
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Roundup affects the chlorophyll so as long as it doesnt get on green leaves its fine.
 
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Old 05-05-20, 06:56 AM
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Roundup will clear surface ground stuff. If the tree is young with shallow roots I would be very cautious. Other wise I think you'll be OK. Just keep in mind that if it should rain soon after that stuff will migrate to the surrounding area.
 
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Old 05-05-20, 08:13 AM
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It is OK to use glyphosate (the herbicide in many RoundUp products) underneath a tree.

Glyphosate is absorbed through the green growing parts of a plant. It is not absorbed through a tree's bark or roots. Glyphosate very readily binds with soil so once it hits the ground that's where it stays. It doesn't "soak in" or wash away so it's not a runoff hazard to rivers & lakes nor to groundwater. And glyphosate is broken down by bacteria in the environment so there is not a problem with it building up with years of use in the same area.
 
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Old 05-07-20, 05:58 AM
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thank you guys !

Probably also good to mention; one of the trees is a spruce.... so no leaves....just needles.
 
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Old 05-07-20, 07:07 AM
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Dont get it on anything green that you dont want to damage. That includes the overspray if its windy. So dont have your sprayer mist, or the mist will carry. A stream works best near anything sensitive.
 
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Old 05-07-20, 01:12 PM
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OK, I'm not refuting anything anybody says here. But my own personal experience says that Round-Up migrates and kills surrounding grass. Because of that I switched to Spectricide brand. It is very accurate and in fact stays where you spray it. It even says that it will not migrate. I can use it to spot spray a weed in the middle of lawn and only that particular spot will be barren within a day. Tried with Round-Up and at least 6" dia would also die out. Just my 2 cents.
 
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