How to Grow Native Hawaiian Grasses

Native Hawaiian Grasses

Multiple species (Heterachne, Eriachne, Chrysopogon, Stipa, and others)

grass

Native Hawaiian grasses encompass a diverse group of endemic and indigenous grass species adapted to Hawaii's varied ecosystems, from coastal dunes to high-elevation slopes. These grasses are essential components of Hawaiian plant communities and play critical roles in watershed management, erosion control, and native habitat restoration. They include species like Uki uki (Festuca hawaiiensis), Pili grass (Heterachne contorta), and Pale oat grass (Stipa sandwicensis).

Looking for a specific variety?

Uki uki Pili Pale oat grass Waiwai Kikoi Kolea

When should you plant Native Hawaiian Grasses in your zone?

Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.

Get my Native Hawaiian Grasses timeline →

Example Native Hawaiian Grasses timeline · Pittsburgh, PA (Zone 6b)

Plant Native Hawaiian Grasses
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Native Hawaiian Grasses
Around Jul 16

≈ 90 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Native Hawaiian Grasses dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun requirements vary by species; most prefer 6+ hours of direct sunlight daily; some upland species tolerate partial shade

💧

Water: Water needs depend on elevation and native habitat; lowland coastal species are often drought-tolerant once established; upland species may require more consistent moisture; most are adapted to Hawaii's natural rainfall patterns and need minimal supplemental watering after establishment

📏

Spacing: 12-24 inches apart depending on species and desired density for landscape use inches

📅

Days to maturity: Varies significantly by species; typically 90-180 days to reach productive growth

🌱

Planting depth: Sow seeds 0.25-0.5 inches deep; transplants established from nursery-grown plugs can be planted at soil line

Soil

Type: Varies by species; generally well-draining soil appropriate to native habitat (volcanic, sandy, or loamy depending on elevation and location)

pH: 6.0-7.5 (varies by species and native habitat)

Amendments:

Minimal amendments needed for native-adapted species Compost or organic matter for soil structure Volcanic cinder or coarse sand for drainage in wet areas Avoid heavy fertilization to maintain native vigor

Growing Zones

Find your zone →

Hawaii (USDA zones 10b-12b); specific species thrive at different elevations and microclimates

10b 11a 11b 12a 12b

Get my Native Hawaiian Grasses timeline →

Growth Stages

Germination & Seedling

2-4 weeks

Small grass seedlings with 2-3 primary leaves emerge from soil

Keep soil consistently moist but not waterlogged; provide bright light; protect from strong wind and direct intense sun if very young; thin seedlings to appropriate spacing

Establishment & Root Development

4-8 weeks

Grass plants develop deeper root systems and produce 4-6 visible leaves; tillers begin to form

Gradually reduce watering frequency as roots establish; monitor for damping-off; light fertilization with balanced, slow-release formula is optional; begin to allow more direct sun exposure

Vegetative Growth

8-16 weeks to several months

Mature grass plants with multiple tillers, extensive foliage, and well-developed root systems; plants fill their designated space

Water according to species and local rainfall; minimal fertilization; allow natural growth pattern; monitor for pests or diseases; mulch around base if needed to retain soil moisture and suppress weeds

Flowering & Seed Production

4-12 weeks depending on species

Seed heads emerge above foliage; delicate inflorescences form characteristic of each species

Reduce supplemental watering to encourage flowering; do not fertilize heavily during this stage; allow plants to flower for wildlife and seed collection if desired; avoid cutting during flowering if seed collection is planned

Dormancy & Seed Maturity

Ongoing through dry season

Seed heads mature and dry; foliage may become dormant in dry seasons; some species retain dry growth for erosion control and habitat structure

Minimal water; no fertilization; seeds can be collected when fully mature and dry; allow dead growth to remain for wildlife habitat and soil protection unless landscaping requirements dictate otherwise

Companion Planting

Plan your garden →

Plant with:

Native Hawaiian ferns (Sadleria, Polystichum) Ohia lehua (Metrosideros polymorpha) Native Hawaiian 'ilima (Sida fallax) Native sandalwood (Santalum) Naupaka (Scaevola) Native Hawaiian sedges (Carex) Pukiawe (Leptecophylla tameiameiae) Native Hawaiian lobelia species Kolea (Coleanthus) Other endemic Hawaiian grasses adapted to the same elevation/habitat

Avoid planting near:

Aggressive invasive grasses (Pennisetum, Andropogon, Paspalum species) Invasive woody plants that shade out native grasses High-nutrient input landscapes that favor invasive species Heavy foot traffic areas that cause soil compaction Plants requiring heavy irrigation that create wet conditions favoring non-native species

Common Pests

Prune affected growth; spray with neem oil or insecticidal soap; introduce natural predators where appropriate
Increase humidity in immediate area; spray with water; use miticide if severe; avoid over-fertilizing
Remove thatch buildup; avoid excessive nitrogen; apply neem oil or targeted insecticides if population becomes severe
Hand pull before flowering; apply pre-emergent herbicides selectively; mulch to suppress seeds; cultural management with appropriate fire regimes where applicable
Select nematode-resistant species where possible; rotate plantings; improve soil health with organic matter; avoid wounding roots

Uses

🦋

Native Ecosystem Restoration & Habitat

Wildlife

Native Hawaiian grasses are essential for restoring degraded native plant communities, providing habitat structure and food sources for native Hawaiian birds, insects, and arthropods. They stabilize soils and protect watersheds from erosion. [source]

🏠

Erosion Control & Soil Stabilization

Household

These grasses are highly effective for slope stabilization, erosion prevention on steep terrain, and preventing sediment loss to streams and coastal areas. Their deep root systems bind soil effectively. [source]

🎨

Traditional Hawaiian Use & Weaving

Craft

Historically, certain native Hawaiian grasses were used in traditional crafts, thatching, and weaving. Modern practitioners study and use these grasses to connect with Hawaiian cultural practices. [source]

🏠

Low-Maintenance Native Landscaping

Household

Once established, native Hawaiian grasses require minimal water, fertilizer, and maintenance compared to introduced ornamental grasses, making them ideal for sustainable, water-efficient landscapes aligned with Hawaiian ecological values. [source]

💊

Traditional Hawaiian Medicine

Medicinal

Some native Hawaiian grasses were traditionally used in Hawaiian healing practices and remedies. These uses represent valuable cultural knowledge connecting botanical species to wellness traditions. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

For seed collection: harvest seed heads when fully mature and dry (typically late summer to fall depending on species); cut seed heads into paper bags and allow additional drying; thresh seeds by rubbing heads gently and winnowing chaff. For landscape maintenance: cut or burn according to species needs and habitat management goals (some species benefit from periodic burning); timing varies by elevation and species. Avoid harvesting during peak breeding season for native Hawaiian birds and insects that depend on these grasses.

Fun Facts

🌱 Native Hawaiian grasses evolved in isolation on the Hawaiian islands, resulting in unique endemic species found nowhere else on Earth, including the highly specialized pili grass which was historically burned to create fuel and controlled grazing landscapes.
🌱 Many native Hawaiian grasses are severely threatened by invasive species, livestock grazing, and habitat destruction; conservation efforts focus on seed banking, propagation in nurseries, and large-scale habitat restoration projects led by organizations like the Nature Conservancy and Hawaiian agencies.
🌱 Some native Hawaiian grasses have extremely fine, delicate seed dispersal mechanisms adapted to Hawaii's wind patterns and can produce viable seeds for decades when properly stored, making them valuable for long-term restoration genetics.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Full Sun Mulch Partial Shade

Shop Native Hawaiian Grasses plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Native Hawaiian Grasses planting timeline

Tell us your zip code and we'll calculate exactly when to start Native Hawaiian Grasses seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.

Get my Native Hawaiian Grasses timeline →