← Plant Guides

How to Grow Australian Finger Lime Red Finger

Wikimedia Commons

Australian Finger Lime Red Finger

Citrus australasica 'Red Finger'

fruit

Red Finger is a cultivar of Australian finger lime, a unique citrus producing small, elongated fruits resembling fingers that burst with juice-filled vesicles. The fruit has deep red flesh and a tart, complex flavor profile popular in molecular gastronomy and gourmet cuisine. This tropical to subtropical shrub or small tree is ornamental as well as productive.

When should you plant Australian Finger Lime Red Finger 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 Australian Finger Lime Red Finger timeline →

Example Australian Finger Lime Red Finger timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Australian Finger Lime Red Finger

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Australian Finger Lime Red Finger

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Australian Finger Lime Red Finger dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily; tolerates partial shade but produces fewer fruits
💧
Water: Regular, consistent watering during growing season; maintain moist but not waterlogged soil. Reduce watering in winter. Drought tolerant once established but produces better with adequate moisture.
📏
Spacing: 120 inches
📅
Days to maturity: 2-3 years from planting for first fruits; full productivity by 4-5 years
🌱
Planting depth: Plant grafted nursery trees at same depth as root ball; slightly raised in heavy soils

Soil

Type: Well-draining loamy to sandy soil with organic matter
pH: 5.5-6.5
Amendments:
Compost aged bark mulch perlite or coarse sand for drainage

Growing Zones

Find your zone →

Thrives in zones 9b-11; can be grown in zone 9a with winter protection

9b 10a 10b 11a 11b

Sign up free to see if Australian Finger Lime Red Finger grows in your zone — and get a personalized planting timeline.

Get my Australian Finger Lime Red Finger timeline →

Growth Stages

1

Establishment

First year

Young tree with small canopy and developing root system; minimal flowering expected

Water regularly, apply mulch, stake if needed for wind protection. Avoid heavy pruning. Establish strong central leader.

2

Vegetative Growth

Years 1-2

Tree develops branching structure and foliage; increasingly dense canopy formation

Light pruning to shape. Continue consistent watering and feeding with balanced citrus fertilizer. Protect from strong winds.

3

Flowering

3-4 weeks

Small white flowers appear in clusters along branches, typically in spring; very fragrant

Do not heavily prune during flowering. Ensure consistent moisture and good nutrient levels. Avoid nitrogen-heavy fertilizers that inhibit flowering.

4

Fruit Development

4-5 months

Small finger-shaped fruits develop and elongate, gradually deepening in red color; fruits mature over 4-5 months

Maintain consistent watering and feeding. Thin fruit if overcrowded for larger individual fruits. Monitor for pests and disease.

5

Harvest

Continuous from winter to early spring

Mature fruits are deep red, firm, and about 2-3 inches long; ready for picking when slightly soft to gentle pressure

Harvest ripe fruits by hand or with pruners. Handle gently to avoid bruising. Fruits continue ripening slightly after picking.

Companion Planting

Plan your garden →

Plant with:

Lemon myrtle Lilly pilly Native Australian plants Ground covers (vetiver grass, clover)

Avoid planting near:

Fennel Black walnut High-competition trees that create dense shade

Common Pests

  • Remove affected leaves; use neem oil sprays; encourage natural parasitoids; reflective mulches

  • Spray with insecticidal soap or neem oil; prune heavily infested branches; encourage beneficial insects

  • Horticultural oil sprays; hand removal; pruning of infested branches

  • Increase humidity; strong water spray to dislodge; neem oil or sulfur sprays if severe

  • Bagging developing fruits; removing dropped fruit; protein bait traps; good sanitation

Uses

🍳

Gourmet Garnish & Molecular Gastronomy

Culinary

Red Finger's stunning juice vesicles are prized by chefs for plating and flavor bursts in modern cuisine. The tart, complex citrus flavor with subtle berry notes complements seafood, cocktails, and desserts. [source]

🍳

Specialty Juices & Cocktails

Culinary

The unique flavor profile works well in craft cocktails, juices, and marmalades. The juice is more flavorful and less acidic than conventional limes. [source]

💊

Traditional Indigenous Uses

Medicinal

Australian aboriginal peoples traditionally used finger limes for vitamin C content and antimicrobial properties. Modern citrus research supports high antioxidant activity. [source]

🏠

Ornamental Landscape Plant

Household

The compact, dense growth habit, attractive foliage, fragrant white flowers, and colorful finger fruits make Red Finger an ornamental specimen tree for subtropical gardens. [source]

🦋

Pollinator & Bird Food

Wildlife

Fragrant flowers attract bees and other pollinators. Ripe fruits provide food for native birds and wildlife in Australian and subtropical gardens. [source]

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

Harvest Tips

Finger limes ripen in winter to early spring (December-March in Southern Hemisphere, November-February in Northern zones 9-11). Pick fruits when they yield slightly to gentle pressure and have deep red coloration. For gourmet use, the caviar-like juice vesicles are the prized component—gently squeeze or cut the fruit to release them. Can be stored 1-2 weeks refrigerated; best used fresh.

Fun Facts

  • 🌱 Finger limes are native to the subtropical rainforests of Far North Queensland, Australia, and remained relatively unknown outside Australia until the 1990s when chefs discovered their unique caviar-like juice vesicles.
  • 🌱 The Red Finger cultivar produces deeply colored red flesh, distinguishing it from other finger lime varieties like the green-fleshed 'Emerald' and 'Australian Sunrise' cultivars.
  • 🌱 A single fruit can contain 40-60 individually packaged juice vesicles that burst in the mouth, making each fruit contain multiple flavor release points—a quality chefs call 'flavor caviar.'

Gardening Terms

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

Cultivar Full Sun Mulch Partial Shade pH
Shop Australian Finger Lime Red Finger plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Australian Finger Lime Red Finger planting timeline

Tell us your zip code and we'll calculate exactly when to start Australian Finger Lime Red Finger 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 Australian Finger Lime Red Finger timeline →