What Can I Mix with Roundup

Carefully pour four parts Roundup and one part white vinegar into the funnel on the top of the plastic spray bottle. Carefully adhere to the ratio of Roundup to vinegar. An improper mix can lead to an ineffective or weakened weed killer.

Can you add dish soap to Roundup?

Adding dish detergent to your weed killer could tear apart the molecular structure of the chemical, making it less effective in killing weeds. … It just would not increase the effectiveness of the weed killer in killing the weed like a true surfactant would.

Can you mix Roundup with vinegar and salt?

The vinegar + salt solution will probably burn the weeds down faster than glyphosate, but glyphosate would likely work slightly better over the long term, especially on large weeds.