Ryan from Houston writes
Do high temperatures (above 95°F) affect results?
How long it takes Roundup Custom Aquatic Terrestial Herbicide to kill weeds depends on the type, age and health of the target weed but is generally within 2 weeks. You do want to apply in temperatures below 85 so best to do so in the morning before higher daytime temperatures.
Answer last updated on: 08/27/2018