Choosing the right grass for your lawn in warm climates like Florida or across the southern United States often comes down to two popular options: bermudagrass and St. Augustine grass. Both are warm-season grasses known for their ability to handle heat, but they perform very differently depending on sunlight, maintenance, and overall lawn conditions.
Because each has its own strengths, many homeowners ask a common question: can you mix bermuda grass with St. Augustine to get the best of both?
While the idea may sound appealing, mixing these grass types usually creates more problems than benefits. Bermudagrass thrives in full sun with aggressive growth, while St. Augustine grass is more shade tolerant and develops a thicker, carpet like appearance. These differences lead to competition, uneven growth, and conflicting lawn care needs.
In most cases, the best path to a healthy lawn is choosing one grass type that matches your conditions and managing it properly from the start.
Key Takeaways
- Mixing bermudagrass and St. Augustine grass is not recommended because their different growth habits and maintenance needs lead to an uneven, difficult-to-manage lawn.
- Bermudagrass thrives in full sun and high traffic areas, while St. Augustine grass is better suited for lawns with partial shade and a more residential, lush appearance.
- Bermudagrass spreads aggressively and can overtake St. Augustine over time, especially in sunny conditions or when mowing heights favor Bermuda.
- If your lawn already has both grass types, transitioning to a single grass variety through proper lawn care or full renovation is the most effective long-term solution.
- Instead of mixing grasses, choosing the right grass for your lawn conditions or improving those conditions leads to a healthier, more uniform lawn.
Can You Mix Bermuda and St. Augustine Grass?
Mixing bermudagrass and St. Augustine grass in the same lawn is not recommended. Although both are warm-season grasses, their growth habits, maintenance needs, and environmental preferences are not compatible.
Bermuda spreads aggressively through stolons and rhizomes, allowing it to quickly take over surrounding areas. St. Augustine grass spreads more slowly and relies only on above-ground runners. When planted together, Bermuda often outcompetes and overtakes St. Augustine over time.
Common issues with mixing include:
- Uneven lawn appearance due to different textures and growth rate
- Competition for nutrients, water, and sunlight
- Conflicting mowing heights and maintenance routines
- Long-term decline of one grass type
For a uniform lawn and consistent lawn care, it is best to choose one grass type based on your yard’s conditions.
Bermuda and St. Augustine Make Equally Great Lawns—On Their Own
Bermuda and St. Augustine are both excellent grass types when used in the right setting. Their differences are not weaknesses. They are what make each grass uniquely suited for specific lawn conditions.
Bermudagrass
Bermudagrass is known for its fine texture, dense growth, and ability to handle heavy foot traffic. It is widely used on golf courses, athletic fields, and sunny lawns because of its durability and rapid recovery.
Bermuda thrives in full sun and requires at least 6 to 8 hours of direct sunlight daily. Its deep root system supports strong drought tolerance, allowing it to stay resilient during dry spells. However, this vigorous growth also means it requires regular mowing and edging to maintain a neat, uniform lawn.
Varieties like BIMINI® Bermuda grass are especially valued for their fine texture and high performance in high-traffic areas.
St. Augustine Grass
St. Augustine grass is prized for its broad blades, deep green color, and thick growth that creates a lush, carpet like appearance. It prefers full sun but has better shade tolerance than most warm-season grasses, allowing it to adapt to partial shade conditions where other grass types may struggle.
It is an excellent option for residential lawns with trees, buildings, or other sources of shade. Common St. Augustine varieties include:
- CitraBlue St. Augustine
- Palmetto St. Augustine
- Floratam St. Augustine
These varieties are often selected for their adaptability, shade tolerance, and overall visual appeal.
St. Augustine grass requires more frequent watering compared to bermudagrass and may be more susceptible to issues like chinch bugs or fungal diseases such as brown patch. The University of Florida IFAS Extension describes chinch bugs as a common culprit of insect damage in St. Augustine.
Nevertheless, with proper lawn care practices, including adequate watering and regular monitoring for pests and diseases, it can develop into a dense, attractive lawn that performs well in shaded areas and other conditions.
Bermuda Grass vs St. Augustine Grass: Key Differences
When comparing bermudagrass vs St. Augustine grass, the differences become clear when you look at how each performs in real lawn conditions.
|
Feature |
Bermuda Grass |
St. Augustine Grass |
|
Texture |
Fine, soft blades |
Coarse texture |
|
Sunlight |
Full sun |
Partial shade |
|
Shade Tolerance |
Low |
High |
|
Drought Tolerance |
High, drought-tolerant |
Moderate |
|
Maintenance |
Frequent mowing |
Less frequent mowing |
|
Traffic |
Ideal for high-traffic areas |
Moderate tolerance |
|
Growth Habits |
Aggressive growth |
Thick, spreading growth |
Bermudagrass thrives in sunny lawns and areas with heavy foot traffic. St. Augustine grass performs better in shaded areas and creates a thicker, more traditional residential lawn look.
Why You Shouldn’t Mix Bermudagrass and St. Augustine
Although both grasses perform well in warm climates, their differences make them incompatible when grown together.
Different Growth Rates and Habits
Bermudagrass spreads aggressively through both above and below-ground growth. This allows it to quickly fill in spaces, but also to invade nearby grass types. St. Augustine grows more slowly, which puts it at a disadvantage when competing for space.
Aesthetic Incompatibility
The contrast between fine Bermuda blades and the coarse texture of St. Augustine creates a patchy, inconsistent look. Over time, this disrupts the appearance of a uniform lawn.
Inconsistent Lawn Health
These grasses have different water and nutrient needs. Bermuda grass thrives in dry, sunny conditions, while St. Augustine grass requires more consistent moisture and better tolerates partial shade. Managing both at once makes proper watering and fertilization difficult.
Conflicting Mowing and Maintenance Needs
Bermudagrass performs best at lower mowing heights, while St. Augustine grass is healthier when maintained taller. Trying to balance both in the same lawn often puts one grass at a disadvantage, leading to thinning, stress, and an uneven, inconsistent appearance over time.
What Happens If You Already Have Both?
In many lawns, a mix of Bermuda and St. Augustine can happen naturally. Bermudagrass can spread from neighboring lawns or begin to establish in sunny patches where conditions favor it. Over time, bermudagrass usually takes over due to its aggressive growth and ability to spread through rhizomes. This leads to a lawn with uneven texture, color differences, and inconsistent growth patterns.
If your lawn already has both grass types, you have a few options:
- Maintain the lawn as-is, accepting a mixed appearance
- Strengthen your preferred grass through proper lawn care practices to gradually encourage it to dominate
- Fully renovate the lawn by removing existing grass and re-sodding with a single grass type for a more uniform result
For long-term results, transitioning to a single grass type is often the best solution.
Best Applications for Bermudagrass vs. St. Augustine Grass
Choosing the right grass for your lawn depends on how your yard is used and the conditions it experiences.
Shaded Areas: St. Augustine grass is the better choice for shaded areas and lawns with partial shade. Varieties such as CitraBlue and Palmetto perform well in limited sunlight.
Athletic Fields and High-Traffic Areas: Bermudagrass is ideal for sports fields, playgrounds, and backyards with heavy foot traffic. Its durability and quick recovery make it a reliable option for active lawns. BIMINI Bermuda is a strong performer in these environments.
Drought-Prone Regions: Bermudagrass is more drought-tolerant and performs better in dry conditions. Its deep root system allows it to survive extended dry spells with less frequent watering.
How to Choose the Right Grass for Your Lawn
If you are deciding between Bermuda and St. Augustine, focus on these key factors:
Sunlight Exposure
Lawns with full sun favor bermudagrass. Areas with partial shade are better suited for St. Augustine.
Maintenance Expectations
Bermudagrass requires more frequent mowing. St. Augustine grass requires more frequent watering.
Lawn Usage
High-traffic areas benefit from bermudagrass. For moderate activity lawns, St. Augustine is a good option.
Soil and Water Conditions
Both grasses adapt to various soil types, but bermudagrass handles drought conditions better, while St. Augustine thrives with consistent moisture.
Can You Use Both Grass Types in Separate Areas?
Using bermuda grass in sunny areas and St. Augustine grass in shaded areas can be a more workable approach than mixing them throughout the same space. This setup takes advantage of each grass type’s strengths without forcing them to compete directly.
However, keeping the two grass types separated can be challenging. Bermudagrass spreads aggressively and may begin to creep into St. Augustine areas over time. To help manage this, physical barriers such as edging, walkways, or landscape borders can be used to create clear separation between zones.
If maintaining separate areas feels difficult or high-maintenance, another option is to improve conditions to better support a single grass type. For example, increasing sun exposure by trimming trees can make a lawn more suitable for bermudagrass, while adjusting irrigation and care practices can help St. Augustine grass perform more consistently.
Frequently Asked Questions
Can you mix bermudagrass with st augustine grass?
Mixing bermudagrass with St. Augustine grass is not recommended for most lawns. Bermuda has aggressive growth habits and spreads quickly, often overtaking slower-growing St. Augustine. Over time, this creates an uneven lawn with inconsistent texture, color, and maintenance needs, making it difficult to maintain a healthy, uniform appearance.
Will bermudagrass take over St. Augustine?
Yes, bermudagrass can take over St. Augustine grass over time. Its aggressive growth, supported by both stolons and rhizomes, allows it to spread rapidly across a lawn. In sunny conditions, bermudagrass thrives and gradually crowds out St. Augustine, especially where maintenance practices favor lower mowing heights or drier conditions.
Which grass is better for shaded areas?
St. Augustine grass is the better choice for shaded areas because of its strong shade tolerance. Although it thrives in full sun, it tolerates partial shade and areas with limited direct sunlight, such as under trees or near buildings. Bermudagrass, on the other hand, requires full sun and tends to thin out or struggle in shaded conditions.
Which grass requires less maintenance?
Maintenance depends on the type of care you prefer. Bermuda grass requires more frequent mowing due to its rapid growth, especially during the growing season. St. Augustine grass generally needs less frequent mowing but requires more consistent watering and attention to pests and fungal diseases to maintain its lush appearance and healthy growth.
How do you fix a lawn with mixed grass types?
Fixing a lawn with mixed grass types usually involves transitioning to a single grass variety. This can be done by removing the unwanted grass and re-sodding with your preferred type. In some cases, improving lawn care practices can help one grass dominate, but full replacement often provides the most consistent and long-term results.
Final Verdict: Bermuda Grass versus St. Augustine Grass
When it comes to bermudagrass vs. St. Augustine, the best choice depends on your lawn’s conditions. Choose bermudagrass if your lawn gets full sun, experiences heavy foot traffic, or faces drought conditions. Choose St. Augustine grass if your lawn has shaded areas and you want a thick, lush appearance.
Rather than mixing grass types, focus on creating a uniform lawn that matches your environment. Starting with high-quality sod makes a significant difference in long-term performance.
At Bethel Farms, we offer premium bermuda and St. Augustine sod varieties suited for warm climates. Explore our sod grass for sale to find the right grass for your lawn and build a healthy, consistent outdoor space.
