Learning how to grow grass in Hawaii is a unique challenge. From coastal plains to volcanic peaks, the islands cover many different climate types. Lawn care routines can look totally different from one neighborhood to the next.
This guide covers everything you need to get it right: how to pick the best warm-season grass for your island location, what Hawaii’s volcanic soils actually need, and how to water, mow, fertilize, and plant a new lawn in a climate that never really takes a break.
Not sure where to start? LawnStarter connects you with local lawn treatment pros who can help keep your lawn healthy no matter which island you call home.
| Key Takeaways |
|---|
| • Warm-season grasses like Bermudagrass, Zoysiagrass, and St. Augustinegrass perform best in Hawaii’s tropical climate. • Hawaii’s diverse microclimates require choosing grass types specific to your exact location and conditions. • Success requires understanding unique challenges like salt spray, volcanic soils, and a year-round growing season. |
How to Choose the Right Type of Grass for Hawaii Lawns
Warm-season grasses grow best in Hawaii’s tropical climate. The five most common types are Bermudagrass, Zoysiagrass, St. Augustinegrass, seashore paspalum, and centipedegrass.
Here’s a quick comparison to help you choose the right lawn grass for Hawaii:
| Grass Type | Best For | Key Characteristics |
| Bermudagrass | High-traffic areas, sports fields | Fast-growing, drought-tolerant, needs frequent maintenance |
| Zoysiagrass | Home lawns, moderate traffic | Dense growth, salt-tolerant, handles partial shade |
| St. Augustinegrass | Shaded lawns, coastal properties | Best shade tolerance, good salt tolerance, less traffic-tolerant |
| Seashore Paspalum | Coastal properties, full sun | Excellent salt tolerance, needs direct sun |
| Centipedegrass | Low-maintenance lawns, inland areas | Slow-growing, low fertilizer needs, poor salt tolerance |
Which Grass Is Right for Your Hawaiian Location?
Your island location matters as much as your lawn goals:
Coastal or oceanfront properties (all islands): Seashore paspalum or St. Augustinegrass — both handle salt spray best.
Leeward (dry) sides (e.g., Kona, Kawaihae, west Maui): Bermudagrass or Zoysiagrass — drought-tolerant and heat-hardy.
Windward (wet) sides (e.g., Hilo, Kailua): St. Augustinegrass is your safest bet — it handles shade and moisture well.
Shaded yards with mature trees: St. Augustinegrass is the clear winner — it’s the most shade-tolerant option on the list.
Inland, low-maintenance lawns: Centipedegrass — lowest fertilizer needs, but keep it away from the coast.
See Related: The Challenges of Growing a Lawn in Coastal Areas
9 Tips on How to Grow Healthy Grass in Hawaii’s Climate
With 2 main seasons — winter and summer — Hawaii seems the easiest place to grow grass. But it has unique challenges that can ruin a lawn if neglected. Here’s a quick look at what every Hawaii homeowner needs to know:
| Tip | Action | Frequency |
| 1. Test Soil | Check pH and nutrients | Every 2 years |
| 2. Aerate | Improve drainage | Once yearly (sandy) or more often (clay) |
| 3. Leave Clippings | Natural fertilizer | Every mow |
| 4. Fertilize | Slow-release formula | Every 2-3 months (May-October) |
| 5. Water Wisely | Only when needed | When drought signs appear |
| 6. Leach Salt | Rinse with fresh water | Occasionally (coastal areas) |
| 7. Mow Correctly | Match height to grass type | Year-round |
| 8. One-Third Rule | Never cut more than one-third | Every mow |
| 9. Control Weeds | Hand-pull or use herbicides | As needed |
1. Test the Soil Every Two Years to Grow Grass in Hawaii
Test your soil at least once every 2 years so you know exactly what your lawn is working with before spending money on fertilizer or amendments.
Hawaii’s soil conditions vary so dramatically across the islands that what works in Honolulu may fail in Hilo. In some places, the topsoil is just a thin, young, poor soil crust over lava flows.
In Hawaii:
Sloped terrain and generous rainfall lead to nutrients leaching from the soil.
Most soil is acidic, but alkaline soil is also present across the islands.
There are at least 248 soil series.
Basic DIY soil test kits cost $10 to $20 and typically include pH plus major nutrients (nitrogen, phosphorus, and potassium). Labs affiliated with the Cooperative Extension Service provide professional soil testing. Basic tests cost $10 to $20, and comprehensive analysis runs $40 to $75.
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2. Aerate Once a Year to Help Grow Grass in Hawaii
Compacted soil, common in high-traffic areas and clay-heavy soils found on drier leeward sides, blocks water, air, and nutrients from reaching grass roots. This creates soggy, disease-prone conditions that can lead to fungal problems like root rot.
Aeration allows air, water, and nutrients to reach the grass roots more easily. For best results, use a core aerator — especially if your lawn sits on the clay-heavy, compaction-prone soils common in Hawaii’s drier leeward areas.
Best time to aerate: At the beginning of the grass’s growing season: late spring or early summer. That’s when damaged roots, stems, or leaves recover easily and the turf benefits most from the loosened soil.
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3. Leave Grass Clippings on Your Hawaii Lawn
Grass clippings are rich in nitrogen and micronutrients released slowly into the soil. Mow the lawn periodically, cutting only up to one-third of the grass length, and leave the clippings on the soil.
Clippings decompose fast enough to avoid creating a nuisance thatch layer and limit the need for synthetic fertilizers. If your clippings tend to be long, invest in a mulching mower.
See Related: Mulching vs. Bagging Grass Clippings
4. Use Slow-Release Fertilizer to Grow Grass in Hawaii
A slow-release fertilizer allows grass to absorb the most nutrients possible and limits toxic leaching into natural bodies of water.
Apply slow-release fertilizer every 60 to 90 days during active growth (May to October). Reduce or skip applications in winter, especially on the windward side where slower growth means nutrients go unused, recommends University of Hawaii at Manoa.
To protect the environment, consider an organic lawn fertilizer like manure, fish meal, or corn gluten meal. Organic options also improve soil texture long-term and add precious micronutrients.
See Related: How Often Should You Fertilize Your Lawn?
5. Water Your Hawaii Grass Only When It Asks For It
Hawaii’s rainfall varies so dramatically that a one-size-fits-all watering schedule will either drown your lawn or leave it parched. Annual rainfall ranges from about 8 inches near Mauna Kea’s summit to 404 inches near Big Bog on the windward slope of Haleakalā, Maui, according to the Rainfall Atlas of Hawaiʻi.
The rule of thumb: Water only when your lawn shows actual signs of drought stress (listed below) — not on a fixed schedule.
Bermudagrass and Zoysiagrass handle dry weather better than overwatering. USGA research shows warm-season grasses stay healthy even when irrigated at just 60% of their full water needs. Irrigate only when you see these signs of drought stress:
Pale-green or grayish color
One-third to one-half of grass wilted
Slow spring-back after walking on lawn
Best watering practices: Irrigate early morning to avoid midday heat. Never water in the evening — wet leaves overnight invite fungal diseases.
6. Leach Hawaii Lawns with Fresh Water to Wash Out Excessive Salt
Warm-season grasses like seashore paspalum and St. Augustinegrass, common on Hawaii lawns, have good salt resilience.
But even they may need soil leaching with fresh water occasionally, especially if you live near shallow, salt-rich water tables or typically irrigate with brackish water. From time to time, give your lawn a good rinse using fresh water.
7. Match Mowing Height to Your Hawaii Grass Type and Season
In Hawaii, you’ll be mowing nearly year-round — warm-season grasses don’t go fully dormant except at high elevations. That makes getting your mowing height right especially important. Cut too short and you stress the roots; cut too tall and you invite disease during Hawaii’s humid winters.
Use the table below to find the recommended height for your specific grass type. This is a key difference from mainland U.S. lawns, where many grass types go dormant and require little to no winter mowing.
Grass correctly mowed is healthier, sturdier, and more resilient to drought, heat, and disease.
| Type of Grass | Mowing Height |
| Bermudagrass | 0.5 to 2.5 inches |
| Carpetgrass | 1 to 2 inches |
| Centipedegrass | 1 to 2 inches |
| St. Augustinegrass | 3.5 to 4 inches |
| Zoysiagrass | 1 to 2 inches |
| Seashore Paspalum | 1 to 2 inches |
In summer (May-October): Cut the grass taller during heat and drought. Taller blades grow deeper roots and shade the soil, limiting water evaporation.
In winter (November-April): Mow at the lower end of the recommended range. This improves air circulation among the blades and exposes the soil to sunlight — keeping fungal diseases like root rot and take-all patch at bay.
8. Use the One-Third Rule When Mowing Hawaii Grass
Cutting less than one-third of the grass length every time you mow leaves the plant with enough resources to heal fast and stay healthy. Adjust your mowing frequency to maintain this rule while keeping grass at the proper height.
9. Control Weeds to Grow Grass in Hawaii Year-Round
In Hawaii, there’s no winter freeze to kill off weeds. That means you’re managing them year-round, across every season. A thick, healthy lawn is your best defense and choosing a dense-growing grass like Zoysiagrass or Bermudagrass gives you a built-in head start.
Since most weeds spread quickly, keep an eye on your lawn and surrounding areas (vegetable garden, flower beds, orchard, and wildlife habitats) and act fast.
Hand pulling works well with young, isolated weeds. Pre-emergent and post-emergent herbicides are good options for broadleaf and grassy weeds trying to set in your garden. But, always contact professionals for large infestations or to get rid of mature noxious shrubs or trees.
When to Plant a New Lawn in Hawaii
In Hawaii, you can plant a new lawn in any season — warm-season grasses at coastal elevations stay active year-round, unlike on the mainland where dormancy creates hard cutoff dates — but the best time is in the spring.
Check out our articles on How to Plant Grass Seed and How to Lay Sod (Step-by-Step Guide) to learn how.
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FAQs
Warm-season grasses thrive in Hawaii’s tropical climate. The five most common types are Bermudagrass, Zoysiagrass, St. Augustinegrass, seashore paspalum, and centipedegrass.
Yes. Hawaii’s warm-season grasses don’t go fully dormant because winter temperatures rarely drop low enough. Grass keeps growing year-round, just more slowly in winter.
That means you’ll be mowing, watering, and managing weeds in every month — not just during a spring-to-fall season like on the mainland.
Hawaii has several low-maintenance ground covers that can replace a traditional lawn — but the right choice depends on your conditions:
• Ilima papa and hinahina suit dry, sunny, and coastal yards.
• Golden glory works well inland.
• Red ivy fills shaded spots.
None require mowing, and most need less fertilizer than turfgrass.
The most common weeds in Hawaii’s lawns, gardens, and pastures include ivy gourd, Guinea grass, hilahila, and fireweed.
Grow the Healthiest Grass in Hawaii
Hawaii’s year-round growing season creates constant challenges for lawn grass. From high humidity and fungal diseases to salt spray and drought, your lawn faces real obstacles.
Fortunately, LawnStarter’s lawn care professionals can solve all your lawn problems quickly. It doesn’t matter if you’re in Honolulu or the other side of the archipelago — LawnStarter’s lawn treatment services and year-round maintenance are easier when Hawaii’s growing season never really takes a break.
Main Image: Lawn in front of a house in Hawaii, USA. Image Credit: EyesTravelling / Adobe Stock
