How hot does it have to get to spray 24d?

What temperature should I spray my 24d at?

When to Spray: The ideal time to spray 2,4-D-based herbicides, is when the weeds have stopped growing and are still small. This is usually in the early spring. Two days after your last mowing, spraying should be done on windless days and temperatures below 90 degrees Fahrenheit.

Roundup will also work at 50 degrees. Roundup won't work at 50 degrees. Spray when it is cooler.

You might also wonder, "How warm do you need to spray weeds?"

You take your Roundup (glyphosate)-filled sprayer outside, and you walk slowly in the cold morning air. Although you might wonder if it is too cold to spray those weeds in the morning, the manufacturer says that the ideal temperature to apply Roundup is between 53-77 degrees Fahrenheit.

Is it possible to spray weeds in hot weather?

Avoid herbicide applications in hot and dry conditions. Dry conditions may affect weed control or crop injury from herbicides. Environment conditions can have an impact on herbicide effectiveness. Herbicides are generally most effective when applied at 70 to 85 degrees Fahrenheit to vigorously growing plants.