01 Mar, 2023
What is Pre-emergent for Lawns and How Does it Work? Pre-emergent herbicides are a vital tool in the fight against lawn weeds. By understanding what pre-emergent is and how it works, homeowners can keep their lawns healthy and free of weeds. What is Pre-emergent? Pre-emergent herbicides are chemicals that are designed to prevent weeds from germinating in your lawn. They work by creating a barrier in the soil that prevents weed seeds from sprouting and taking root. Pre-emergent herbicides are typically applied in a granular form and should be watered in after application to activate the chemicals. You may have seen lawns have been sprayed with blue or green dye. Blue and green dye are often mixed into pre-emergent herbicides to make it easier to see where the product has been applied. This can help to prevent overlap and ensure that the herbicide is applied evenly across the lawn. However, the use of dyes is not always necessary and should be used with caution as they may have some drawbacks, as mentioned earlier. Is Pre-emergent the Same as Fertilizer? Pre-emergent herbicides are not the same as fertilizer. While both products can be applied to lawns, they serve different purposes. Fertilizer is used to provide essential nutrients to grass and promote healthy growth, while pre-emergent herbicides are used to prevent weeds from germinating. Does Pre-emergent Hurt Grass? When used properly, pre-emergent herbicides should not harm grass. They work by preventing weed seeds from germinating, and do not typically have an impact on established turfgrass. However, it's important to follow all label directions and apply the product at the recommended rate to ensure that you are not applying too much, which could cause damage to your lawn. How Long Does Lawn Pre-emergent Last? The length of time that pre-emergent herbicides last can vary depending on several factors, including the specific product used, the time of year, and weather conditions. In general, most pre-emergent herbicides provide protection for several months, but it's important to reapply the product as needed to ensure continued protection against weeds. Soil Temperature and Weed Germination Soil temperature plays a crucial role in weed seed germination. Different types of weeds have different temperature preferences for germination, but in general, most weed seeds begin to germinate when soil temperatures reach a consistent 55-60 degrees Fahrenheit. By applying pre-emergent herbicides before soil temperatures reach this range, homeowners can prevent weeds from ever taking root in their lawn. Conclusion Pre-emergent herbicides are a valuable tool for preventing weeds in your lawn. By understanding how they work and using them properly, homeowners can keep their lawns healthy and free of unsightly weeds. Remember to always follow label directions when using any type of lawn care product and take precautions to ensure the safety of people, pets, and wildlife. With proper use, pre-emergent herbicides can help keep your lawn looking beautiful all season long.