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Crystal from Longview,wa writes

Would Casoron be good to use under raised flower beds?

Can I apply Casoron on the ground underneath all the dirt and soil when making my raised beds? My thought was to eliminate weeds from coming up through. Also does it work on morning glory and blackberry bushes?


We would not recommend Casoron 4G for raised beds or flower/ornamental areas as many species have not been tested over and it could cause damage to the plants. A better option would be Snapshot for a granule to put down in beds as long as they are not vegetables. Snapshot TG is ideal for ornamental and flower bed areas to prevent a wide range of grassy and broadleaf weeds from emerging. Normally you will want an application of this to the top of the soil though  as if you only treat deep in the ground you will not have a barrier on the surface where your first weeds would start to grow and appear. Since a pre emergent is designed to create a wall like barrier in the soil, it needs to be applied after all soil and plants have been put into place as disturbing the soil after application will remove the barrier. 

Answer last updated on: 04/26/2019

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Casoron 4G Herbicide

Casoron 4G Herbicide

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