Weed Control
Q.

can i use preen on my garden ?

Zone Ninnekah ok zone 6a zip 73067 | retired ok added on March 5, 2019 | Answered

I had three operations last year and my garden got over run with johnson grass . i I have preen and i was wondering if i can use it in my garden. if so when and how much to use. john t.

A.
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Downtoearthdigs
Certified GKH Gardening Expert
Answered on March 6, 2019

A herbicide alone is not generally enough to control Johnson Grass.
Preen does list Johnson Grass as one of the targeted weeds.
Apply according to the packaging.

https://www.gardeningknowhow.com/plant-problems/weeds/controlling-johnson-grass.htm

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drtreelove
Answered on March 6, 2019

Preen is a brand of weed control products. There are different formulations. If you are referring to Preen Garden Weed Preventer, it is for control of broadleaf weeds and not grasses. It will not be effective for the Johnson grass.

This article outlines some strategy and products:
https://www.gardeningknowhow.com/plant-problems/weeds/controlling-johnson-grass.htm

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