How to Grow Variegated Flax Lily
Variegated Flax Lily
Dianella caerulea 'Variegata'
grassVariegated Flax Lily is an ornamental perennial grass-like plant featuring striking blue-green and cream-colored striped foliage. It produces delicate blue flowers followed by attractive blue berries, adding year-round visual interest to gardens. This cultivar is more compact and decorative than its species parent due to its distinctive variegation.
When should you plant Variegated Flax Lily in your zone?
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Example Variegated Flax Lily timeline · Pittsburgh, PA (Zone 6b)
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Plant Variegated 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 Variegated Flax Lily
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-11, tolerates zone 7b with protection
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Establishment
4-6 weeksYoung plant establishing root system with minimal above-ground growth. Variegated foliage is present but less robust.
Water consistently, protect from extreme heat and frost. Do not fertilize heavily; light feeding only. Mulch lightly to retain moisture.
Vegetative Growth
3-8 monthsPlant develops full foliage clumps with mature variegated leaves reaching 12-24 inches tall. Leaves display prominent cream and blue-green striping.
Maintain moderate moisture. Divide overcrowded clumps if necessary. Remove any solid green or entirely variegated reversion shoots to maintain cultivar purity.
Flowering
4-8 weeksDelicate, small star-shaped blue to violet flowers appear on thin stems held above the foliage in late spring to early summer.
Flowers attract pollinators. Light deadheading is optional; allowing some flowers to set seed encourages berry production.
Fruiting
8-12 weeksSmall, round berries develop in summer and mature to a distinctive metallic blue color by mid to late summer, providing ornamental interest.
Berries are attractive to birds and wildlife. Can self-seed if berries are not harvested. Allow some berries to mature for wildlife food.
Dormancy/Maintenance
3-4 monthsPlant remains evergreen but foliage growth slows in winter. Variegated foliage persists and may intensify in color.
Minimal watering required. Do not prune heavily; remove only dead or damaged foliage. Light cleanup of old leaf material encourages new spring growth.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity and air circulation. Spray with water to dislodge. Use insecticidal soap or neem oil if severe.
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Inspect regularly, especially leaf undersides. Remove by hand or treat with horticultural oil in late winter.
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and
(Gastropoda)
Remove debris that provides shelter. Hand-pick, use copper barriers, or apply slug bait around plants in moist conditions.
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Improve air circulation, avoid wetting foliage. Remove affected leaves. Apply fungicide if widespread.
Uses
Ornamental foliage accent
HouseholdThe striking variegated blue-green and cream striped foliage serves as an excellent focal point or accent plant in mixed borders, containers, and landscape beds. Its contrasting coloration brightens shaded areas and pairs well with both flowering plants and other foliage-focused specimens. [source]
Fresh floral arrangements
HouseholdThe attractive variegated foliage and delicate blue flowers make it a valuable addition to fresh cut flower and foliage arrangements. The stems are sturdy enough to last several days in water. [source]
Bird and pollinator support
WildlifeThe blue flowers attract bees and other pollinators, while the ornamental blue berries provide food for birds and wildlife, supporting local ecosystems throughout summer and early fall. [source]
Container and landscape design
HouseholdIts compact, clumping growth habit and year-round variegated foliage make it ideal for containers, borders, and mixed plantings in Mediterranean, contemporary, and tropical-influenced garden designs. [source]
Traditional plant use
MedicinalDianella species have a long history of use in traditional Aboriginal Australian medicine, though specific clinical evidence is limited. The plant is primarily grown today for ornamental purposes. [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 typically harvested for use, but berries can be allowed to mature for ornamental appeal and wildlife food. Foliage can be used in fresh arrangements; cut stems as needed without significantly harming the plant.
Fun Facts
- 🌱 Dianella caerulea is native to Australia and is sometimes called 'Paroo lily' or 'Blue flax lily' in its native range, where it has been used by Aboriginal peoples for thousands of years.
- 🌱 The striking blue metallic berries are sometimes called 'blueberries' colloquially but are not true berries in the culinary sense; they are ornamental and are attractive to native Australian birds and other wildlife.
- 🌱 The 'Variegata' cultivar's striped foliage can occasionally revert to solid green or solid variegated forms; gardeners often remove these reversion shoots to maintain the distinctive bicolor appearance that makes this cultivar special.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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