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Mary from Fort Walton Beach, Fl writes

Can I use SpeedZone Southern Herbicide on my St Augustine lawn that has been invaded by Oxalis?

It has a purple flower. Speedzone seems to injure oxalis, but it's still popping up. I've not used dish soap in the past - is it okay to add to Speedzone to make it stick better?


Per the label instructions for SpeedZone Southern Herbicide it is not necessary to add any type of adjuvant to SpeedZone Southern as it is already designed for rapid penetration and uptake.  All adjuvants including surfactants, spreader stickers, detergents etc. will change the physical and biological properties of this product, which are often antagonistic, and show no significant influence on efficacy. SpeedZone Southern Herbicide is a post emergent which will kill the weeds that have emerged, it will not prevent weeds from growing.

Answer last updated on: 05/04/2017

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SpeedZone Southern Herbicide

SpeedZone Southern Herbicide

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