Kara from Dacula writes
Hi-Yield 2, 4-D Selective Weed Killer, like most herbicides, generally is most effective when applied to vigorously growing plants at 65 to 85 degrees. When temperatures are higher than this, weeds can actually start to produce a thicker waxy coating to protect themselves from these hot, dry conditions. Herbicide movement within the plant will then be reduced because of a slower rate of absorption and metabolism within the weed, causing poor weed control. Application herbicides early in the morning after the plants have recovered from the heat of the previous day will provide better weed control than afternoon or evening applications.
Answer last updated on: 08/21/2017
