Pre-emergent herbicides should be applied before fertilizing your lawn to effectively prevent weeds from germinating. This timing ensures that the pre-emergent forms a protective barrier in the soil, which stops weed seeds from sprouting, while fertilizer can later provide the nutrients needed for healthy grass growth.
When to Apply Pre-Emergent Herbicides?
Applying pre-emergent herbicides at the right time is crucial for effective weed control. The best time to apply these products is in early spring, before the soil temperature consistently reaches 55 degrees Fahrenheit. This timing helps prevent the germination of common weeds like crabgrass, which typically begin to sprout when soil temperatures warm up.
- Early Spring: Apply when soil temperatures are between 50-55°F.
- Late Summer/Early Fall: Consider a second application to control winter weeds.
How to Apply Pre-Emergent Herbicides?
Proper application of pre-emergent herbicides is essential for their effectiveness. Here’s how you can apply them correctly:
- Mow Your Lawn: Ensure your lawn is mowed to a manageable height.
- Water the Lawn: Lightly water the lawn before application to help the herbicide adhere to the soil.
- Spread Evenly: Use a broadcast spreader for even distribution.
- Water Again: Water the lawn after application to activate the herbicide.
Should Fertilizer Be Applied Before or After Pre-Emergent?
For optimal lawn care, apply fertilizer after the pre-emergent herbicide. Here’s why:
- Pre-Emergent First: Creates a barrier against weeds.
- Fertilizer Second: Provides nutrients to strengthen grass, helping it outcompete any potential weeds.
Benefits of Applying Pre-Emergent Before Fertilizer
Applying pre-emergent before fertilizing has several advantages:
- Weed Prevention: Stops weeds before they start, reducing competition for nutrients.
- Efficient Nutrient Use: Grass absorbs nutrients more effectively without competing weeds.
- Enhanced Lawn Health: Promotes a thicker, healthier lawn that can naturally resist weeds.
Common Mistakes to Avoid
To maximize the effectiveness of pre-emergent herbicides, avoid these common mistakes:
- Late Application: Applying after weeds have germinated reduces effectiveness.
- Improper Watering: Not watering enough can prevent the herbicide from activating.
- Uneven Application: Can lead to patchy weed control.
People Also Ask
What happens if you apply pre-emergent too late?
Applying pre-emergent herbicides too late allows weeds to germinate, rendering the treatment ineffective. Once weeds have sprouted, post-emergent herbicides are necessary for control.
Can you apply pre-emergent and fertilizer at the same time?
While it’s possible to apply pre-emergent and fertilizer simultaneously, it’s generally better to apply pre-emergent first. This ensures the herbicide forms a barrier before fertilizer encourages grass growth.
How often should pre-emergent be applied?
Pre-emergent herbicides should be applied twice a year: once in early spring and again in late summer or early fall. This schedule helps control both summer and winter weeds.
Does rain affect pre-emergent application?
Rain can be beneficial if it occurs shortly after application, as it helps activate the herbicide. However, heavy rain can wash it away, reducing effectiveness.
What types of weeds do pre-emergent herbicides control?
Pre-emergent herbicides primarily control annual grassy weeds like crabgrass and some broadleaf weeds. They do not affect weeds that have already germinated.
Conclusion
Applying pre-emergent herbicides before fertilizing is a strategic approach to maintaining a healthy, weed-free lawn. By timing your applications correctly and following proper procedures, you can enhance your lawn’s resilience and appearance. For further guidance, consider exploring topics like lawn care schedules or choosing the right fertilizer for your grass type.
Next Steps: Evaluate your lawn’s current condition and plan your pre-emergent and fertilization schedule accordingly. For more detailed advice, consult a local lawn care professional or extension service.