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Tom from Tampa Florida writes,

Celsius WG Herbicide product life

I bought this and the product was manufactured two years prior (according to the label on the container). I appears to lose effectiveness rather quickly, wherein I have to now double the dose to get some response. The weeds are in a new area, so it is not likely there is weed resistance to Celsius occurring. Can you provide guidance as to the increased rate of application with product age?


When stored properly, out of extreme temperatures and out of direct sunlight, you can expect Celsius to last for about 3 years from the date of purchase. We no longer sell this product so any additional questions, we would recommend contacting the manufacturer, Bayer.

Answer last updated on: 01/03/2015

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