When to Apply Pre Emergent in Michigan
Pre emergent herbicides are an essential tool in the fight against weeds. By applying them at the right time, you can prevent weed seeds from germinating and taking over your lawn or garden. In Michigan, the timing for applying pre emergent herbicides can vary depending on the type of weeds and the specific conditions of your area. In this article, we will discuss when to apply pre emergent in Michigan and provide some frequently asked questions about this topic.
Timing for Pre Emergent Application in Michigan
The timing for pre emergent application in Michigan largely depends on the type of weeds you are targeting. Here are some general guidelines for when to apply pre emergent herbicides in Michigan:
1. Crabgrass: Crabgrass is one of the most common and troublesome weeds in Michigan. The ideal time to apply pre emergent herbicides for crabgrass control is in early spring when soil temperatures reach around 55 to 60 degrees Fahrenheit. This usually occurs when forsythia or magnolia trees start to bloom. Applying pre emergent herbicides too early or too late may reduce their effectiveness.
2. Broadleaf Weeds: For broadleaf weeds like dandelions, chickweed, and clover, the application of pre emergent herbicides is less effective. These weeds typically reproduce by seeds that germinate throughout the growing season. For effective control, it is best to apply post emergent herbicides or use other cultural practices like regular mowing and proper fertilization.
3. Annual Grasses: Besides crabgrass, some other annual grasses like foxtail and barnyard grass can also be controlled with pre emergent herbicides. The timing for their control is similar to crabgrass, i.e., when soil temperatures reach around 55 to 60 degrees Fahrenheit.
Frequently Asked Questions (FAQs)
Q: Can I apply pre emergent herbicides in the fall?
A: In Michigan, applying pre emergent herbicides in the fall is generally not recommended. Most pre emergent herbicides have a limited lifespan and may break down before the next growing season, leaving your lawn vulnerable to weed infestation.
Q: Can I apply pre emergent herbicides after planting grass seed?
A: No, pre emergent herbicides create a barrier in the soil that prevents weed seeds from germinating. Unfortunately, they also inhibit the germination of desirable grass seeds. It is best to wait until your new grass is established before applying pre emergent herbicides.
Q: How long does the pre emergent herbicide remain effective?
A: The effectiveness of pre emergent herbicides can vary depending on the product, environmental conditions, and proper application. Generally, most pre emergent herbicides provide control for about 2 to 3 months. However, it is important to follow the specific instructions on the herbicide label for accurate timing and reapplication.
Q: Can I apply pre emergent herbicides during rainy periods?
A: Ideally, pre emergent herbicides should be applied on dry days when rain is not expected within 24 to 48 hours. Heavy rainfall shortly after application may wash away the herbicide before it can properly establish a barrier in the soil.
Q: Can I use pre emergent herbicides on vegetable gardens?
A: Pre emergent herbicides are not recommended for use on vegetable gardens. These herbicides can hinder the growth of desirable vegetable seeds, leading to poor germination and stunted growth. It is best to use other weed control methods like mulching, hand weeding, or targeted post emergent herbicides for vegetable gardens.
In conclusion, applying pre emergent herbicides at the right time is crucial for effective weed control in Michigan. Timing can vary depending on the type of weeds and the specific conditions of your area. It is essential to read and follow the instructions on the herbicide label for accurate timing and application rates. Additionally, it is important to consider other cultural practices like regular mowing, proper fertilization, and post emergent herbicide use for complete weed control in your lawn or garden.