![]() Always refer to the product label for specific application instructions. This will help prevent weeds from spreading new seeds and sprouting up in the spring. A final application is recommended to be put down in the fall, between August and October, and when soil temperatures are 55 plus degrees. Most post emergents need to be applied more than once throughout the growing season. Then activate it using water sprinklers or a garden hose. If using a granular form, apply the herbicide to the lawn using a spreader. This will allow the product to get maximum contact with the root of the weed by transferring down through the plant from the foliage. For best results, do not mow your lawn before the application. If using a liquid form, spray it directly onto the weeds you are trying to get rid of. Post emergents come in a liquid form to be applied with a sprayer and a granule form to be applied using a spreader. Most selective herbicides can be broadcast over the area that is infested with the target weed. Non-selective herbicides will kill anything it comes in contact with.Īpply non-selective herbicides to only those weeds or foliage you wish to eliminate, being careful to avoid desirable plants. Selective herbicides, will only affect the target weed listed. In the future, applying lawn weed killers to control cool season weeds is done by January or February (you could spray in November or December when weeds are even younger). ![]() By the time they are old enough to bloom in spring, herbicides are not as effective. They are broken up into two categories, selective and nonselective. These native buttercups ( Ranunculus) grow over the winter cool season. Post-emergent products are designed to kill weeds that have already sprung up. In this video, learn when to apply post-emergent herbicides on your lawn to effectively prevent weeds from taking over. No one likes the sight of weeds in their yard. ![]()
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