Pre-emergent herbicides are typically used by professionals to prevent weeds from germinating. This type of herbicide is applied before seeds have a chance to sprout, and it works by creating a barrier that inhibits weed growth. Pre-emergent herbicides are most effective when applied before the weed seed germination period, which varies depending on the type of weed.
There are many different pre-emergent herbicides available on the market, and the best one for your needs will depend on the type of weeds you’re trying to control. Some common active ingredients in pre-emergent herbicides include pendimethalin, prodiamine and trifluralin.
When using any kind of pesticide, it’s important to follow the directions on the label carefully. This will help you avoid damaging your lawn or harming other plants nearby.