How to Change Grass Type

Changing your grass type can revitalize your lawn, but it’s a process that requires careful planning and execution. This guide provides a comprehensive, step-by-step approach to successfully replacing your existing turf with a new grass variety. From initial assessment to post-installation care, we’ll walk you through every stage to ensure a lush, healthy new lawn.

Are you tired of a lawn that looks dull, struggles in the heat, or is constantly battling weeds? Perhaps you dream of a lush, green carpet that requires less maintenance or is better suited to your local climate. Whatever your reason, changing your grass type is a rewarding project that can dramatically improve the appearance and health of your yard. This comprehensive guide will take you through the entire process, from deciding on the best new grass to enjoying your beautiful new lawn.

This guide will cover:

• Assessing your current lawn and environment.
• Choosing the ideal grass type for your needs.
• Methods for removing your existing turf.
• Preparing your soil for the new grass.
• The best ways to plant your chosen grass.
• Essential aftercare for successful establishment.

Let’s get started on transforming your lawn!

Key Takeaways

• Thorough Planning is Crucial: Before you begin, understand your climate, soil conditions, and desired lawn characteristics to select the right grass type for your area.
• Eliminating the Old Lawn is Key: Completely killing off your existing grass is essential to prevent it from competing with your new grass.
• Proper Soil Preparation is Non-Negotiable: Healthy soil is the foundation of a healthy lawn, so ensure it’s tilled, amended, and level before planting.
• Choose the Right Planting Method: Whether you opt for seed, sod, or plugs, understand the pros and cons of each and choose what best suits your budget and timeline.
• Patience and Consistent Care are Vital: Your new lawn won’t establish overnight. Consistent watering, mowing, and fertilization are crucial for its success.
• Understand Dormancy and Seasonal Changes: Different grass types have varying dormancy periods and optimal growing seasons, which you must consider for successful establishment.

Step 1: Assess Your Current Lawn and Environment

Before you can change your grass type, you need to understand what you’re working with. This involves looking at your current lawn’s health, identifying its type (if possible), and analyzing your local environmental conditions.

Identify Your Current Grass Type (Optional but Recommended)

Knowing what you have can help you understand why it might not be performing as you’d like. Is it a cool-season grass struggling in summer heat, or a warm-season grass that looks sparse in cooler months? Resources like how to identify grass type can be incredibly helpful here.

Analyze Your Climate

This is arguably the most important factor. Grasses are broadly categorized into cool-season and warm-season types.

• Cool-season grasses (like fescues, ryegrass, and bluegrass) thrive in moderate temperatures, typically found in the northern United States. They have active growth spurts in spring and fall and may go dormant in hot summers.
• Warm-season grasses (like Bermuda, Zoysia, and St. Augustine) prefer hot weather and are common in the southern United States. They grow best in the summer and go dormant, turning brown, in the winter.

Consider your average high and low temperatures throughout the year, including the length and intensity of your summers and winters.

Evaluate Your Soil Conditions

Your soil is the foundation of your lawn.

• Soil Type: Is your soil sandy, clayey, or loamy? Different grasses prefer different soil textures. Sandy soils drain quickly, while clay soils retain moisture. Loamy soil is often considered ideal.
• pH Level: Most turfgrasses prefer a slightly acidic to neutral pH, generally between 6.0 and 7.0. You can test your soil’s pH using a home kit or by sending a sample to your local extension office.
• Drainage: Does water pool on your lawn after rain? Poor drainage can lead to root rot and other problems.
• Sunlight Exposure: How much direct sunlight does your lawn receive throughout the day? Some grasses tolerate shade better than others.

Step 2: Choose the Best New Grass Type

Once you have a clear understanding of your environment, you can begin to select the grass type that will thrive. This is where you’ll want to do some research. A great starting point is to explore guides on how to choose the best grass type for your lawn.

Consider these factors when making your choice:

• Climate Suitability: This is paramount. Choose a grass that is adapted to your region’s temperatures and growing season.
• Sunlight Requirements: Match the grass to the amount of sun your lawn gets.
• Water Needs: Some grasses are drought-tolerant, while others require consistent moisture.
• Maintenance Level: Are you looking for a low-maintenance lawn, or are you willing to put in the effort for a golf-course-quality finish? Some grasses need more frequent mowing, fertilization, and watering.
• Wear Tolerance: If you have children or pets who will be playing on the lawn, you’ll need a grass that can withstand foot traffic.
• Disease and Pest Resistance: Some varieties are naturally more resistant to common lawn problems.

For example, if you live in a hot climate with mild winters and want a hardy lawn that can handle a lot of play, Bermuda grass might be a good choice. If you’re in a cooler region and prefer a softer, finer texture, you might consider Kentucky bluegrass.

Step 3: Eliminate the Old Lawn

This is a critical step. You cannot simply plant new grass over the old. The old grass will compete for resources, and your new lawn will likely fail. You need to kill it completely.

Method 1: Chemical Removal (Herbicides)

This is often the quickest method, especially for large areas.

• Choose the Right Herbicide: A non-selective herbicide, like glyphosate (commonly found in Roundup), will kill all vegetation it touches. Follow product instructions carefully.
• Timing is Key: Apply the herbicide when the grass is actively growing and temperatures are moderate (not too hot or too cold). This ensures maximum absorption.
• Application: Ensure even coverage. You may need a sprayer. Wear protective clothing.
• Waiting Period: Most herbicides require a waiting period before you can replant. This can range from a few days to a few weeks, depending on the product. Read the label!

Important Note: If you are concerned about chemical use, explore natural methods.

Method 2: Natural/Organic Removal

These methods take more time but are environmentally friendly.

• Solarization: This involves covering the lawn with clear plastic sheeting during the hottest part of the year. The sun’s heat trapped under the plastic effectively “cooks” the grass and weed seeds. This can take 4-8 weeks.
• Smothering: Cover the lawn with a thick layer of organic material, such as compost, mulch, or cardboard. This deprives the grass of sunlight and air, eventually killing it. This can take several months.

Method 3: Physical Removal (Rototilling or Sod Cutter)

This is labor-intensive but provides immediate results.

• Rototilling: You can use a rototiller to break up and churn the sod. However, this often leaves roots and crowns in the soil, which can resprout. You’ll likely need to follow up with other methods or meticulous removal.
• Sod Cutter: Renting a sod cutter is an effective way to slice under the turf and lift it in strips. You can then remove the sod and compost it or dispose of it. This is best done when the soil is slightly moist but not saturated.

Important Consideration: Whichever method you choose, ensure that the old grass is completely dead and removed before proceeding to soil preparation. This often involves removing the dead thatch and any remaining roots.

Step 4: Prepare the Soil

Once the old lawn is gone, your soil needs to be ready to receive the new grass. This is arguably the most important step for long-term lawn health.

Clear Debris and Level the Area

Remove any rocks, roots, or debris left from the old lawn. Rake the area smooth.

Till the Soil

Loosen the soil to a depth of at least 4-6 inches. This improves aeration, drainage, and allows new roots to penetrate easily. If you used rototillers or a sod cutter, you may have already accomplished this.

Amend the Soil

Based on your soil test results (from Step 1), you’ll want to add amendments to improve its structure, fertility, and pH.

• Organic Matter: Adding compost or well-rotted manure is beneficial for almost all soil types. It improves drainage in clay soil and water retention in sandy soil.
• Nutrients: Incorporate a starter fertilizer that is balanced in nitrogen, phosphorus, and potassium. Phosphorus is particularly important for root development.
• pH Adjustment: If your soil is too acidic, add lime. If it’s too alkaline, add sulfur. Follow recommended application rates carefully.

Work these amendments into the top 4-6 inches of soil.

Grade and Level

After amending, rake the soil to create a smooth, even surface. Ensure there are no low spots where water can collect, and the grade gently slopes away from your house. A smooth, level surface is crucial for even seed germination or sod laying.

Compact the Soil (Lightly)

Lightly compact the soil by walking over it or using a roller. This settles the soil and removes large air pockets, which can lead to uneven germination or drying. You don’t want it rock hard, just firm.

Step 5: Plant Your New Grass

You have several options for planting your new grass, each with its own advantages.

Method 1: Seeding

This is usually the most economical method, but it requires patience and careful timing.

• Choose Your Seed: Select a high-quality seed mixture that matches your chosen grass type and is suitable for your region. Look for certified seed for best results.
• Timing: The best time to seed depends on your grass type. Cool-season grasses are best seeded in early fall or early spring. Warm-season grasses are best seeded in late spring or early summer, after the last frost.
• Spreading the Seed: Use a broadcast spreader for even distribution. If you are overseeding an existing lawn, you might use a drop spreader. For smaller areas, you can spread by hand. Follow the recommended seeding rate for your chosen grass.
• Raking and Rolling: Lightly rake the seed into the top 1/4 inch of soil to ensure good seed-to-soil contact. Then, lightly roll the area to further press the seed into the soil.
• Watering: Keep the seedbed consistently moist. This means light, frequent watering (several times a day) until the grass germinates and is about an inch tall. Overwatering can wash seeds away, while letting it dry out will kill germinating seeds.

Be aware that it takes time for grass seed to grow. For example, understanding how long does it take for Bermuda grass seed to grow can help set expectations.

Method 2: Sodding

Sodding provides an instant lawn, but it is more expensive.

• Ordering Sod: Order sod from a reputable supplier. Ensure it is delivered fresh and in good condition.
• Timing: Sod can be laid any time the ground is not frozen, but it’s best done during cooler, moist periods (spring or fall) to reduce stress on the sod.
• Laying the Sod: Start laying sod strips along the longest, straightest edge of your lawn (like a driveway or sidewalk). Press each strip firmly into the prepared soil, staggering the joints like bricks in a wall. Ensure there are no gaps or overlapping edges.
• Watering: Water immediately and thoroughly after laying the sod. Keep the sod consistently moist for the first 2-3 weeks, watering deeply to encourage root establishment.

Method 3: Plugs or Sprigs

This method is ideal for certain grass types, like Zoysia or Bermuda grass, and can be more cost-effective than sod for large areas, though it takes longer to fill in.

• Plugs: These are small, golf-ball-sized pieces of sod with roots. Plant them in a grid pattern, typically 6-12 inches apart, depending on the grass type and how quickly you want it to spread.
• Sprigs: These are individual stems or pieces of grass rhizomes. They are planted mechanically or by hand into the soil.
• Timing: Plant plugs or sprigs during the active growing season for your chosen grass type.
• Watering: Water thoroughly after planting and keep the soil consistently moist until the grass spreads and fills in. You might need to help it spread, for instance, by learning how to help Bermuda grass spread.

Step 6: Aftercare for Success

Once your new grass is planted, the work isn’t over. Proper aftercare is crucial for establishing a strong, healthy lawn.

Watering

This is the most critical element.

• New Seed: As mentioned, keep the seedbed consistently moist.
• New Sod: Water deeply to encourage roots to grow into the soil.
• Established Lawn: Once your new grass is established (usually after a few weeks to a month, depending on the method), transition to deeper, less frequent watering. This encourages deep root growth, making the lawn more drought-tolerant. Water early in the morning to minimize evaporation and reduce the risk of fungal diseases.

Mowing

Wait until your new grass has reached a good height before mowing.

• For Seed: Mow when the grass is about 3-4 inches tall. Set your mower to a higher setting than you normally would. Avoid cutting more than one-third of the blade length at a time.
• For Sod: You can mow sod once it has rooted and shows signs of new growth, following the same principles of not removing too much blade length.

Keep your mower blades sharp to make clean cuts, which helps prevent disease. For specific grasses like Bermuda, understanding how often to cut Bermuda grass will be important as it matures.

Fertilizing

Wait to fertilize until your new grass is well-established and showing consistent growth.

• Starter Fertilizer: If you didn’t incorporate a starter fertilizer during soil preparation, you may apply one once the grass is a few weeks old and growing.
• Ongoing Care: Follow a regular fertilization schedule based on your grass type’s needs. This usually involves applications in spring and fall for cool-season grasses, and more frequent feeding during the active summer months for warm-season grasses.

Weed Control

Your new lawn will be vulnerable to weeds.

• Prevention: A thick, healthy lawn is the best defense against weeds.
• Manual Removal: Pulling weeds by hand is effective, especially when the lawn is young.
• Herbicides: If necessary, use herbicides cautiously once the grass is established. Always choose a product that is safe for your specific grass type.

Troubleshooting Common Issues

* Bare Spots: These can occur due to poor seed-to-soil contact, uneven watering, or pest damage. Reseed or patch as needed, ensuring good contact and moisture.
* Weeds Outcompeting New Grass: This usually indicates that the old grass wasn’t fully eliminated or that the new grass is struggling due to poor soil or inadequate care. Reassess your removal and preparation steps.
* Yellowing Grass: This can be a sign of overwatering, underwatering, nutrient deficiency, or incorrect pH. Adjust your watering schedule and consider a soil test and fertilization.
* Slow Establishment: Patience is key, but if growth is exceptionally slow, check soil temperature, moisture levels, and nutrient availability.

Conclusion

Changing your grass type is a significant undertaking, but by following these steps, you can achieve a beautiful, healthy lawn that meets your specific needs and preferences. Remember that success hinges on careful planning, thorough preparation, choosing the right grass for your environment, and providing consistent care during establishment. With dedication, your new lawn will soon be the envy of the neighborhood.