St. Augustine vs Centipede Grass — Which Do You Need?

St. Augustine vs centipede grass comes down to three factors: how much shade your yard gets, how much maintenance you want to do, and whether your soil runs acidic or neutral. St. Augustine handles shade and spreads aggressively but demands more water and fertilizer. Centipede grows slowly, costs less to feed, and thrives in acidic soil — but struggles in shade and alkaline conditions. Your climate zone, budget, and yard conditions determine which turf performs better long-term.

What Is the Difference Between St. Augustine and Centipede Grass?

St. Augustine and centipede grass differ in blade width, growth rate, and soil preference. St. Augustine produces wide, coarse blades and aggressive stolons suited to partial shade. Centipede produces narrow, light-green blades and slow lateral growth suited to low-maintenance, acidic-soil lawns.

How Do Leaf Blade Width and Color Compare?

St. Augustine blade width ranges from 1/4 inch to 1/2 inch, with a dark green to blue-green color depending on cultivar. Blades have rounded tips and a coarse texture visible from several feet away.

Centipede blade width measures 1/8 inch to 1/4 inch, roughly half the width of St. Augustine. Centipede displays a lighter, yellow-green hue that homeowners sometimes mistake for nutrient deficiency.

How Do Growth Habits and Spread Patterns Differ?

St. Augustine spreads through thick above-ground stolons and produces no rhizomes. Stolons root aggressively at each node, allowing St. Augustine to fill bare spots in 2 to 3 weeks during peak growing season.

Centipede spreads through thin stolons at roughly half the rate of St. Augustine. Centipede produces shorter internodes and grows closer to the soil surface. Full coverage from plugs takes centipede 1 to 2 growing seasons longer than St. Augustine.

How Do I Tell If I Have Centipede or St. Augustine Grass?

Pull a single stolon and examine the leaf blade width and node spacing. St. Augustine stolons are thick, purple-tinted, and spaced 1 to 3 inches between nodes. Centipede stolons are thin, green, and spaced less than 1 inch between nodes.

Leaf arrangement provides a second identification cue. St. Augustine leaves fold along the midrib in a V-shape. Centipede leaves lie flat and alternate along the stem without folding.

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Which St. Augustine vs Centipede Grass Handles Sun, Shade, and Temperature Extremes Better?

Climate performance between St. Augustine and centipede grass splits along shade tolerance and cold hardiness. St. Augustine tolerates more shade. Centipede tolerates slightly colder winters in certain cultivars.

Which Grass Performs Better in Shade?

St. Augustine tolerates up to 6 hours of shade per day depending on cultivar. Shade-tolerant St. Augustine varieties maintain density under tree canopies where other warm-season grasses thin out.

Centipede requires at least 6 hours of direct sun per day. Centipede planted in moderate shade develops elongated stems, sparse coverage, and increased disease pressure. Centipede is not a viable choice for heavily shaded lots.

What Are the Cold Tolerance and Heat Tolerance Limits of Each?

Both grasses enter dormancy when soil temperature drops below 55 degrees Fahrenheit. Neither St. Augustine nor centipede stays green year-round in the upper transition zone (USDA zones 7b–8a).

Centipede survives brief exposure to temperatures as low as 5 degrees Fahrenheit, roughly 5 to 10 degrees colder than most St. Augustine cultivars. St. Augustine suffers significant cold damage below 20 degrees Fahrenheit in exposed areas.

Heat tolerance is comparable between the two grasses. Both perform well in sustained temperatures above 95 degrees Fahrenheit, provided adequate moisture reaches the root zone.

How Do St. Augustine vs Centipede Maintenance Requirements Compare?

Maintenance cost and time between St. Augustine and centipede grass hinge on fertilizer input, mowing frequency, and irrigation demand. Centipede costs roughly half as much to feed annually. St. Augustine demands more frequent mowing and watering.

What Are the Mowing Height and Frequency Differences?

St. Augustine performs best at a mowing height of 3 to 4 inches. During peak summer growth, St. Augustine requires mowing every 5 to 7 days to prevent scalping and thatch accumulation.

Centipede performs best at a mowing height of 1.5 to 2 inches. Centipede's slower growth rate reduces mowing frequency to every 10 to 14 days during the growing season.

How Do Fertilizer and Water Needs Differ?

Centipede requires 0.5 to 1 pound of nitrogen per 1,000 square feet per year. St. Augustine requires 2 to 4 pounds of nitrogen per 1,000 square feet per year — roughly 2 to 4 times the fertilizer input of centipede.

St. Augustine needs 1 to 1.5 inches of water per week to maintain color and density. Centipede needs roughly 1 inch per week and shows better drought tolerance during brief dry spells, though extended drought damages both grasses equally.

Both St. Augustine and centipede benefit from annual core aeration to reduce thatch buildup and improve nutrient uptake, especially in compacted clay soils common across the Southeast. Browse Lawn Aerators to find the right machine for your soil type and lot size.

What Are the Negatives of Centipede Grass?

Centipede develops iron chlorosis in soils with pH above 6.5. Alkaline or neutral soils cause centipede to yellow and thin, requiring repeated iron applications that add cost and labor.

• Centipede is susceptible to ground pearls — a scale insect with no effective chemical control
• Centipede recovers slowly from heavy foot traffic and pet damage
• Centipede thins in shade below 6 hours of direct sun
• Centipede develops "centipede decline" from over-fertilization above 2 pounds of nitrogen per 1,000 square feet

Why Does No One Sell St. Augustine Grass Seed?

The absence of St. Augustine grass seed in retail channels traces to extremely low seed viability and poor germination rates. St. Augustine seed germinates at rates below 10 percent under controlled conditions, making commercial seed production economically impractical.

How Is St. Augustine Established Without Seed?

St. Augustine is established through sod, plugs, or stolon cuttings. Sod provides instant coverage and costs $0.30 to $0.80 per square foot depending on cultivar and region. Plugs cost less upfront but require 2 to 3 months for full coverage during the growing season.

Stolon broadcast planting is a third option for large areas. Fresh stolons are machine-chopped and spread across prepared soil at a rate of 200 to 400 bushels per acre. This method reduces material cost compared to sod on properties over 5,000 square feet.

What Establishment Options Does Centipede Grass Offer?

Centipede grass is available as sod, plugs, and seed. Centipede seed costs $15 to $25 per pound and covers approximately 1,000 square feet at recommended seeding rates. Seed establishment takes 14 to 28 days for germination and 2 full growing seasons for dense coverage.

Centipede sod costs $0.25 to $0.55 per square foot, generally less than St. Augustine sod. The seed option gives centipede a significant cost advantage for budget-conscious homeowners willing to wait for coverage.

How Do You Choose the Right St. Augustine vs Centipede Grass for Your Region and Soil?

The right grass between St. Augustine and centipede depends on your USDA hardiness zone, native soil pH, and site-specific pest pressure. Each variable narrows the field to one clear winner for a given property.

Which USDA Zones and Soil Types Favor Each Grass?

St. Augustine performs best in USDA zones 8 through 10 on soils with a pH range of 6.0 to 7.5. Sandy, well-drained soils along the Gulf Coast and Florida peninsula produce the densest St. Augustine turf.

Centipede thrives in USDA zones 7 through 9 on acidic soils with a pH of 5.0 to 6.0. The sandy, acidic soils of the Carolinas, Georgia, and east Texas provide ideal conditions for centipede. Centipede planted in alkaline soils above pH 6.5 develops persistent chlorosis.

What Pests and Diseases Threaten Each Turf Type?

Chinch bugs are the primary insect threat to St. Augustine. Southern chinch bugs feed on St. Augustine stolons and cause irregular brown patches that expand outward during hot, dry weather. Damage often appears first in sunny, south-facing lawn sections.

Ground pearls are the primary insect threat to centipede. Ground pearls attach to centipede roots and feed on plant sap underground. No labeled chemical control exists for ground pearls, making prevention through proper soil preparation the only defense.

• St. Augustine: gray leaf spot, brown patch, take-all root rot
• Centipede: large patch, centipede decline, fairy ring

What Should You Do If You Need to Remove or Transition Between St. Augustine and Centipede Grass?

Transitioning between St. Augustine and centipede requires complete removal of the existing turf layer before replanting. Neither grass coexists well with the other long-term due to competing growth habits and different maintenance requirements.

What Kills Centipede Grass but Not Other Grass?

Sethoxydim-based herbicides selectively kill centipede grass without damaging most other warm-season grasses including bermuda and zoysia. Apply sethoxydim at labeled rates during active centipede growth (soil temperatures above 65 degrees Fahrenheit) for effective control.

St. Augustine is also damaged by sethoxydim, so this herbicide does not work for removing centipede from a mixed St. Augustine-centipede lawn. In that case, glyphosate application to the entire area followed by re-sodding is the standard approach.

How Do You Remove Existing Turf Before Replanting?

A sod cutter removes the top 1 to 2 inches of turf and root mass in strips, leaving bare soil ready for grading and re-establishment. Sod cutting is faster and more thorough than chemical-only removal, which leaves dead root material in the soil.

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Frequently Asked Questions About St. Augustine vs Centipede Grass

The most common st. Augustine vs centipede questions cover coexistence, cost, dormancy color, pet safety, and establishment time. The answers below resolve each with specific guidance.

Can St. Augustine and Centipede Grass Grow Together in the Same Lawn?

St. Augustine and centipede grass compete poorly when planted together. St. Augustine's aggressive stolons overtake centipede within 1 to 2 growing seasons in fertilized lawns.

Maintaining a mixed stand requires different mowing heights and fertilizer rates for each grass, which is impractical in a shared lawn. Choosing one grass and removing the other produces a healthier, more uniform turf with lower maintenance costs over time.

Which Grass Is Cheaper to Install and Maintain Long-Term?

Centipede costs less to install and maintain over a 5-year period. Centipede seed establishment runs $15 to $25 per 1,000 square feet versus $250 to $800 for St. Augustine sod over the same area.

Annual fertilizer costs for centipede run roughly $10 to $20 per 1,000 square feet. St. Augustine fertilizer costs run $20 to $50 per 1,000 square feet annually due to double or triple the nitrogen requirement. Water costs compound this difference in metered-water municipalities.

Does Centipede Grass Stay Green Year-Round?

Centipede grass does not stay green year-round in most of its growing range. Centipede enters dormancy and turns brown when soil temperatures drop below 55 degrees Fahrenheit.

In south Florida and coastal areas of USDA zone 10, centipede may retain partial green color through mild winters. In zones 7 through 9, expect 3 to 5 months of brown dormancy each year. St. Augustine follows the same dormancy pattern in overlapping zones.

Is St. Augustine Grass Safe for Pets and Children?

St. Augustine grass is nontoxic to dogs, cats, and children. The grass itself poses no ingestion or contact risk. Any hazard comes from pesticides or herbicides applied to the lawn, not from the grass species.

St. Augustine's thick, cushioned growth habit makes it a comfortable surface for play areas. The wide blades and dense stolon mat provide more padding underfoot than centipede's thinner, lower-profile turf layer.

How Long Does It Take Each Grass to Fully Establish?

St. Augustine sod establishes a functional root system in 10 to 14 days. Full density from plugs takes 3 to 6 months during the growing season. Stolon broadcasting fills in within 2 to 3 months under irrigation.

Centipede sod roots in 14 to 21 days. Centipede seed germinates in 14 to 28 days but requires 2 full growing seasons to achieve dense, mature coverage. Centipede plugs spaced 12 inches apart take 12 to 18 months to close gaps completely.