Does Weed and Feed Kill Grass Seed?
The desire for a lush, green lawn is a common one. Many homeowners turn to weed and feed products for a quick and easy solution to pesky weeds and a healthy lawn. However, a common question arises: does weed and feed kill grass seed? The answer is a bit complex and depends on a few factors.
Weed and feed products contain herbicides designed to kill unwanted weeds, but they can also harm young, delicate grass seedlings. While some products claim to be "safe for new lawns," it's crucial to understand the potential risks involved.
Understanding Weed and Feed Ingredients
Weed and feed products typically combine herbicides with fertilizers. Herbicides can be selective, targeting specific types of weeds, or non-selective, killing any type of vegetation. The most common herbicides in weed and feed products are 2,4-D, dicamba, and MCPP, which are selective herbicides generally safe for established lawns.
Fertilizers provide essential nutrients for grass growth, but they can also contribute to the harm of newly seeded lawns. Excessive nitrogen in fertilizers can lead to "burning" or damage to delicate seedlings.
The Risk of Using Weed and Feed on New Lawns
Applying weed and feed to a newly seeded lawn can be risky because the young seedlings are extremely vulnerable. The herbicides can inhibit root development, leading to stunted growth or even death.
Here are some of the key reasons why weed and feed can harm new grass seed:
- Herbicide Sensitivity: Grass seed is particularly sensitive to herbicides during germination and early development.
- Root Development: Herbicides can interfere with the root system's growth, making it difficult for seedlings to absorb essential nutrients and water.
- Nutrient Competition: The fertilizer in weed and feed can contribute to nutrient competition, further stressing young seedlings.
Alternatives to Weed and Feed on New Lawns
If you are starting a new lawn, consider using alternative methods for controlling weeds. These methods are gentler on newly seeded lawns and can help ensure successful establishment:
- Pre-Emergent Herbicides: These herbicides are applied before weeds germinate. They create a barrier that prevents weed seeds from sprouting.
- Hand-Pulling Weeds: While labor-intensive, this method is safe for new lawns and provides precise weed control.
- Mulching: Mulch can help suppress weeds and improve soil health.
Tips for Using Weed and Feed Safely
If you must use weed and feed on an established lawn, follow these tips:
- Read the Label: Always check the product label for specific instructions and precautions.
- Follow Application Rates: Over-application can damage existing grass and increase the risk of harming new seedlings.
- Avoid Newly Seeded Areas: Keep the weed and feed application away from recently seeded areas.
- Water Thoroughly: Water deeply after application to help the product penetrate the soil.
Conclusion
Using weed and feed on a new lawn can be risky, potentially harming delicate grass seedlings. It is advisable to choose alternative weed control methods for new lawns. By understanding the potential risks and following safe practices, you can effectively manage weeds and create a healthy, vibrant lawn without sacrificing the growth of new seedlings.