FloridaLandscapeIQ
Flax Lily (Dianella tasmanica) growing in South Florida
Grade Florida #1

Flax Lily — South Florida Plant Guide

Dianella tasmanica

Family: Asphodelaceae · Groundcover

Legal status pending editorial verification. Confirm with your county before installation.

Landscape Uses

groundcoverbordermass plantingfoundation edgingwildlife garden

Style Tags

contemporarynaturalisticflorida friendlylow maintenance

South Florida Growing Guide

Light Requirements

Full SunPartial SunPartial Shade

Water Requirements

Low2/10

Once established (12–18 months), Flax Lily is drought-tolerant and requires minimal supplemental irrigation in South Florida.

Low water once established. Water 1-2x per week in dry season — drought tolerant. Rainy season requires no supplemental irrigation.

Soil and Fertilization

sandylimestoneloamwell drained

Fertilizer: Light balanced granular. Over-fertilization causes lush growth with weaker drought performance.

Schedule: February and September with light slow-release granular. Low fertilizer requirements.

Salt Tolerance

Moderate (5/10) — some protection from direct spray recommended
Mature Height
12.5 ft
Mature Width
1.53 ft
Growth Rate
moderate
Water Demand
2/10
Florida Grade
Florida #1
Installed Cost
$
USDA Zones
8b, 9a, 9b, 10a, 10b, 11
FLEPPC Status
None
Iguana Rating
7/10

Where to Buy in South Florida

Find Flax Lily at South Florida nurseries — check availability and pricing at nurseries near you.

Frequently Asked Questions

How fast does Flax Lily grow in South Florida?

Flax Lily has a moderate growth rate. In South Florida's warm, humid climate it typically establishes quickly with proper watering and fertilization.

Is Flax Lily safe for pets?

Flax Lily is not safe for pets. Berries may cause GI upset in pets if ingested in quantity. Low risk in landscape settings.

How much water does Flax Lily need in South Florida?

Low water needs (2/10). Once established (12–18 months), Flax Lily is drought-tolerant and requires minimal supplemental irrigation in South Florida.

Can Flax Lily tolerate salt air in South Florida?

Flax Lily has moderate salt tolerance (5/10). It can handle some coastal exposure but should be protected from direct ocean spray.

Is Flax Lily available in Miami-Dade County?

In Miami-Dade County, Flax Lily is classified as: allowed. Allowed.

County Availability in South Florida

Miami-Dade County

Allowed

Allowed. Non-restricted.

✓ Coastal OK

USDA Zone 10a–11. Tropical climate, year-round warmth and humidity.

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Broward County

Allowed

Allowed. Common in Broward xeriscape and HOA groundcover programs.

✓ Coastal OK

USDA Zone 10a–10b. Subtropical with warm winters and wet/dry seasons.

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Palm Beach County

Allowed

Allowed. Very good cold hardiness throughout Palm Beach County.

✓ Coastal OK

USDA Zone 9b–10b. Transitional zone with occasional winter cold in north.

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Collier County

Allowed

Allowed. Used in Naples area drought-tolerant landscapes.

✓ Coastal OK

USDA Zone 10a–10b. Subtropical Gulf Coast with seasonal flooding.

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Monroe County

Allowed

Allowed. Moderate salt tolerance — protected Keys sites.

USDA Zone 11. Tropical maritime, highest salt exposure of all 5 counties.

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Full ordinance references and permit requirements available to Professional subscribers. Always verify current county requirements before installation.

Need a Spec Sheet?

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Ask about Flax Lily

Get answers grounded in UF/IFAS research and South Florida landscape data.