St. Augustine Grass: How to Remove It Like a Pro

St. Augustine grass, with its lush, emerald green blades, is a popular choice for warm-climate lawns. However, its aggressive growth habit can quickly turn this desirable turf into a tenacious weed in unwanted areas of your yard, garden beds, or even walkways. Removing St. Augustine grass effectively requires patience and the right techniques. This comprehensive guide will equip you with the knowledge and strategies to tackle this common lawn care challenge like a pro.

Why is St. Augustine Grass So Difficult to Remove?

St. Augustine grass's resilience stems from its extensive rhizome system – underground stems that spread horizontally, sending up new shoots. This means that simply pulling up visible grass blades won't eliminate the plant; the rhizomes will continue to regenerate new growth. Its ability to quickly establish itself, coupled with its tenacious hold, makes complete removal a challenge.

What are the Best Methods for Removing St. Augustine Grass?

The most effective method depends on the scale of the infestation and the location. Here are several proven strategies:

1. Hand-Digging and Removal: Small Infestations

For small patches of St. Augustine grass, hand-digging can be effective. However, it's crucial to be thorough:

• Careful Excavation: Use a sharp trowel or garden fork to carefully dig out the grass, removing as much of the rhizome system as possible. Try to get down at least 4-6 inches deep.
• Patience is Key: This is labor-intensive, but it's environmentally friendly and avoids the use of harsh chemicals.
• Follow-up: Regularly monitor the area for regrowth and remove any new shoots as they appear.

2. Herbicides: Larger Infestations

For larger infestations, herbicides can be a more efficient approach. However, it’s essential to choose the right herbicide and apply it correctly:

• Selective Herbicides: Opt for selective herbicides, which target specific grasses without harming other plants. Always read and follow the label instructions carefully.
• Timing is Crucial: Applying herbicides during the active growing season will yield the best results.
• Multiple Applications May Be Necessary: St. Augustine grass can be persistent, and multiple applications might be required for complete eradication.
• Environmental Considerations: Be aware of the environmental impact of herbicides and follow best practices to minimize harm to beneficial insects, pets, and water sources.

3. Solarization: A Natural Approach

Solarization is an eco-friendly method involving covering the affected area with clear plastic sheeting during the hottest part of the summer. The intense heat under the plastic essentially cooks the grass and its rhizomes.

• Preparation: Thoroughly water the area before covering it to trap moisture and enhance heat buildup.
• Plastic Covering: Secure clear plastic sheeting tightly over the area, ensuring there are no gaps.
• Duration: Leave the plastic in place for several weeks, depending on your local climate and the intensity of sunlight.

How to Prevent St. Augustine Grass from Returning?

Preventing re-infestation is just as important as removal:

• Landscaping Barriers: Install landscape barriers, such as edging or concrete, to prevent the grass from spreading into undesired areas.
• Mulching: A thick layer of mulch can prevent seeds from germinating and stymie regrowth.
• Regular Monitoring: Regularly inspect areas where St. Augustine grass was previously present to catch any new sprouts early.

What are the Different Types of Herbicides Used to Kill St. Augustine Grass?

Many herbicides are effective against St. Augustine grass. However, it is crucial to consult a local gardening expert or agricultural extension office to determine the most appropriate herbicide for your specific situation and environmental conditions. They can advise on the best product for your area and help you avoid harming beneficial plants.

Is it Easier to Remove St. Augustine Grass in the Spring or Fall?

Removal is generally more effective in spring or early summer when the grass is actively growing and more susceptible to herbicides. Fall applications can also be effective, but the process might take longer due to slower growth rates.

Conclusion

Removing St. Augustine grass effectively requires a strategic and persistent approach. Choosing the right method, understanding the grass's growth habits, and implementing preventative measures are crucial for achieving long-term success. Remember to always prioritize safety and environmental considerations when selecting and applying herbicides. With careful planning and execution, you can successfully reclaim your garden beds and walkways from this tenacious turf.