How to Remove Purple Deadnettle From Your Lawn

Purple deadnettle is a winter annual weed that can quickly invade lawns, especially in shaded or damp areas where the turf is weak. If left unchecked, it can smother grass and spread rapidly across your lawn.

Fortunately, there are effective strategies for controlling and eliminating chickweed from your lawn without causing damage to your grass. Control it with post-emergents like SpeedZone Broadleaf Weed Killer. Always read product labels to ensure compatibility with your grass type.

Tailored Treatment Plans for Purple Deadnettle Infestation

Small Infestations: Hand-Pulling and Cultural Controls

For smaller infestations, non-chemical methods like hand-pulling can be highly effective. Purple deadnettle has a shallow root system, which makes it relatively easy to remove. However, it’s crucial to pull up the entire plant, including the roots, to prevent regrowth.

Hand-Pulling:

This method is best when the soil is moist, as the weed comes out more easily. Wear protective gloves to ensure you grip the plant fully, and remove the entire root to prevent the weed from re-establishing. Once pulled, dispose of the weed properly to avoid spreading seeds.

Cultural Practices:

After removing the weed, focus on maintaining a thick, healthy lawn by mowing regularly, watering deeply but infrequently, and fertilizing properly. This will prevent new weeds from taking hold.

Moderate Infestations: Post-Emergent Herbicides and Lawn Care

For moderate infestations, where purple deadnettle has spread but not overtaken large areas of your lawn, a combination of cultural controls and selective post-emergent herbicides is recommended.

Post-Emergent Weed Control:

Apply a selective post-emergent weed control product that targets broadleaf weeds like purple deadnettle. Herbicides containing 2,4-D or Dicamba, such as SpeedZone Broadleaf Weed Killer, are effective. However, be mindful of your grass type, as some post-emergents can damage sensitive grasses like St. Augustine or centipede. Always check the product label to ensure compatibility with your lawn.

Optimal Application Window:

Post-emergent weed control products are most effective in early spring when purple deadnettle is actively growing. Apply the product during this time to maximize its impact and prevent the weed from seeding.

Severe Infestations: Combine Pre-Emergent, Post-Emergent, and Cultural Strategies

For large, persistent infestations, a more aggressive approach is required. In these cases, combining pre-emergent and post-emergent weed control with ongoing lawn maintenance is the best solution.

Pre-Emergent Weed Control:

To prevent future outbreaks, apply a pre-emergent herbicide in the fall, when purple deadnettle seeds begin to germinate. Pre-emergents like Prodiamine Herbicide are effective at creating a barrier in the soil that stops the weed from sprouting. Timing is critical—apply in the fall before temperatures cool significantly and seeds begin to take hold.

Post-Emergent Herbicide:

In early spring, use a selective post-emergent herbicide to kill any existing purple deadnettle. Be sure to follow label directions carefully to avoid damaging your lawn, and use herbicides that are compatible with your grass type. For example, herbicides with atrazine are better suited for sensitive grasses like St. Augustine and centipede.

Cultural Controls:

After treating the infestation, ensure you follow a lawn care routine that promotes dense grass growth, including aeration, regular mowing and proper watering techniques. Over time, these practices will help prevent weeds from returning.

Post-Treatment Lawn Recovery Tips

After removing purple deadnettle from your lawn, it’s important to focus on lawn recovery to avoid leaving bare spots that weeds can exploit. Here’s how to rehabilitate your lawn after chemical treatments:

Overseed or Plug Bare Spots:

If the weed removal process has left bare patches, overseed or plug these areas with a dense, competitive grass variety like Lawnifi Premium Grass Seed or plugs. These grasses are thick-bladed and better at outcompeting future weed growth.

Soil Amendments:

If your lawn struggles to grow thick and healthy, consider applying soil amendments like lime or organic matter to correct pH imbalances and improve soil structure. Conducting a soil test can help determine what your soil needs.

Fertilization:

Use a balanced fertilizer to strengthen your turf, helping it recover from the stress of herbicide treatments. Products like Lawnifi® provide slow-release nutrients that support ongoing grass growth without encouraging weed development.

Common Mistakes to Avoid

When controlling purple deadnettle, it’s important to avoid common mistakes that can reduce the effectiveness of your treatment efforts. Here are some pitfalls to watch out for:

Incorrect Weed Control Application:

Applying pre-emergents or post-emergents at the wrong time or using the wrong product can lead to poor results. Always follow the label instructions carefully to ensure proper timing and dosage.

Neglecting Lawn Care:

Skipping key lawn care practices like mowing, fertilization, or irrigation can leave your grass weak and vulnerable to future weed infestations. Regular maintenance is essential for a healthy, weed-resistant lawn.

Overwatering:

Purple deadnettle thrives in moist conditions. Overwatering your lawn can create an environment where this weed and others can easily grow. Water your lawn deeply but less frequently to encourage deep root development in your grass.

Choosing Cheap Herbicides:

While it may be tempting to opt for cheaper herbicides, these products are often less effective and may require multiple applications, ultimately costing more in the long run. Invest in quality herbicides that are proven to work against purple deadnettle and are safe for your specific grass type.

How Do I Remove Purple Deadnettle from My Lawn? – Answered

To remove purple deadnettle, start by hand-pulling small infestations, making sure to remove the entire root to prevent regrowth. For moderate infestations, use a selective post-emergent herbicide in early spring, when the weed is actively growing.

In severe cases, combine pre-emergent weed control products applied in the fall with post-emergent treatments in the spring, while maintaining a healthy lawn through regular mowing, proper irrigation, and fertilization. After treatment, overseed bare patches or use grass plugs and apply soil amendments to strengthen your turf and prevent future infestations.

Always choose the right herbicide for your grass type and avoid common mistakes like improper application or neglecting basic lawn care.