How to Grow Silver Stripe Flax Lily
Silver Stripe Flax Lily
Dianella caerulea 'Silver Stripe'
grassA striking ornamental grass-like perennial with variegated foliage featuring blue-green leaves boldly striped with white or cream. It produces delicate blue flowers in spring followed by decorative blue berries. This cultivar is prized for its dramatic foliage contrast and year-round visual interest.
When should you plant Silver Stripe Flax Lily in your zone?
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Example Silver Stripe Flax Lily timeline · Pittsburgh, PA (Zone 6b)
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Plant Silver Stripe Flax Lily
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Silver Stripe Flax Lily
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Silver Stripe Flax Lily dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-11; marginal in zone 7 with protection
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Establishment
3-4 monthsYoung plant with compact growth, developing characteristic variegated foliage
Keep soil consistently moist, provide afternoon shade if in hot climate, avoid root disturbance
Vegetative Growth
6-10 monthsRapid leaf production and clump expansion; variegation becomes more pronounced
Maintain moderate moisture, light feeding with balanced fertilizer in spring, remove any all-green or all-blue reversions
Flowering
4-8 weeks (spring to early summer)Delicate pale blue to purple flowers appear on thin stems above foliage
Flowers are secondary to foliage appeal; deadhead or leave for berry production; maintain regular watering
Fruiting & Berry Production
Several months (summer through fall)Small, metallic blue berries develop and persist on the plant, adding ornamental value
Leave berries for wildlife and prolonged visual interest; berries can self-seed if desired
Dormancy & Maintenance
2-4 months (winter)Plant maintains foliage year-round in most climates but growth slows; variegation intensifies in cooler months
Reduce watering in winter, trim dead foliage in late winter/early spring, avoid fertilizing
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Inspect regularly, prune affected foliage, spray with horticultural oil in early spring
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Increase humidity with overhead watering, apply neem oil or miticide if infestation severe
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Remove debris, hand-pick, use copper tape barriers, apply organic slug pellets if needed
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Isolate affected plants, spray with neem oil or insecticidal soap, wipe with alcohol-soaked cloth
Uses
Landscape & Border Accent
OrnamentalThe variegated foliage provides year-round visual interest and brightens shaded areas. Excellent as a specimen plant, in containers, or as an accent in mixed perennial borders where its bold white stripes create strong focal points. [source]
Pollinator & Bird Food
WildlifeSpring flowers attract pollinators including bees and butterflies, while the persistent blue berries provide food for birds in late summer and fall. [source]
Floral & Foliage Arrangements
CraftThe distinctive variegated leaves add texture and contrast to cut flower arrangements and are valued by florists for their long vase life and structural interest. [source]
Container & Indoor Decoration
HouseholdThrives in decorative pots on patios, decks, and entryways. Can be grown indoors in bright indirect light as a houseplant, though growth is slower. [source]
Traditional Uses
MedicinalDianella species have a history in traditional Aboriginal medicine. The berries and roots were used in various preparations, though modern scientific validation is limited. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Not harvested; grown ornamentally. Berries can be collected for propagation (seeds require stratification). Foliage can be cut for long-lasting arrangements; harvest in morning after dew dries.
Fun Facts
- 🌱 Dianella caerulea is native to Australia and is sometimes called Flax Lily despite not being a true flax; the name refers to its iris-like, grass-like foliage.
- 🌱 The brilliant blue berries are particularly attractive to native Australian birds and are rarely eaten by introduced species, making them a wildlife-friendly ornamental.
- 🌱 The 'Silver Stripe' cultivar was selected specifically for its striking variegation, which intensifies during cooler months and can fade slightly in intense summer heat—a reason to provide afternoon shade in hot climates.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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