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Australian Finger Lime plant image
Rutaceae TREE OUTDOOR Placement Primary: Food Ornamental

Australian Finger Lime

Citrus australasica

Identified By Marcs

The Australian Finger Lime is a unique understory rainforest tree native to the coastal regions of eastern Australia. It is widely celebrated for its cylindrical fruits containing juice vesicles that resemble citrus caviar, which pop in the mouth to release a tart, lime-like flavor. The plant features small leaves, thorny branches, and produces small white or pale pink flowers. In recent years, it has gained immense popularity among chefs and gardeners worldwide for its culinary versatility, unique aesthetics, and ability to thrive in pots or garden beds when provided with adequate care, well-draining soil, and protection from extreme frosts.

Also known as: Finger Lime Caviar Lime

Toxicity & Safety

Is Australian Finger Lime toxic to pets?

Yes, toxic to pets.

The Australian Finger Lime, like many citrus species, contains essential oils such as limonene and linalool, as well as various psoralens, which can be toxic to pets including cats, dogs, and horses. Ingestion of the plant's leaves, stems, or fruit peel can lead to symptoms such as vomiting, diarrhea, excessive drooling, lethargy, and dermatitis upon contact. It is important to keep pets away from the thorny branches and fallen fruit to prevent gastrointestinal irritation or systemic toxicity.

Is Australian Finger Lime toxic to humans?

No, Australian Finger Lime is generally safe for humans.

Is Australian Finger Lime safe during pregnancy?

Generally considered safe during pregnancy.

Growth & Dimensions

Height 200 - 600 cm
Width 150 - 300 cm
Growth Rate Moderate
Care Level Moderate
Lifespan Perennial

Ideal Environment

Temperature 5°C - 35°C
Sunlight Hours 6 - 8 hrs/day
Sun Exposure Full sun
Soil pH 6 - 7
Watering Interval 5 - 10 days
Humidity 50.00% - 80.00%
USDA Zone 9 - 11

Subtropical and Temperate Coastal Regions

Climate: Thrives in warm, frost-free climates with moderate humidity and reliable rainfall, though it can tolerate light frosts once established.

Soils: Loam Sandy Loam Well-draining compost mix
Annual Rainfall: 800 - 1500 mm

Native Regions

New South Wales
Queensland

How to Care for Australian Finger Lime

How should I handle sunlight and watering?

Ensure your Australian Finger Lime receives at least six hours of direct sunlight daily. Water the plant deeply when the top few centimeters of soil feel dry to the touch. Avoid letting the roots sit in waterlogged soil, as this can lead to root rot.

How to Propagate Australian Finger Lime

How to propagate Australian Finger Lime by grafting?

Grafting is the most reliable and widely used method for propagating Australian Finger Limes. Select healthy scion wood from a mature, high-yielding tree and graft it onto vigorous rootstock such as trifoliate orange or sweet orange seedlings. Ensure the cambium layers align properly, secure the union tightly with grafting tape, and keep the plant in a humid, warm environment until the graft successfully takes and new shoots begin to emerge actively.

Common Diseases & Pests of Australian Finger Lime

What is Citrus Gall Wasp and how is it treated?

Pest
Symptoms:

Swelling or woody galls forming along the branches of the tree, caused by wasps laying eggs inside the stems. Severe infestations can stunt branch growth and reduce fruit yield significantly over time.

Treatment:

Prune out infected stems well below the galls during winter and dispose of them properly by sealing them in plastic bags. Avoid heavy high-nitrogen fertilizers that encourage soft, vulnerable new growth.

Prevention:

Inspect the tree regularly for early signs of swelling, apply fine insect-exclusion netting during the egg-laying season, and maintain balanced nutrition to keep the plant vigorous and resistant to major pest attacks.

Properties & Benefits of Australian Finger Lime

Bears Fruit Aromatic Plant

Uses & Health Benefits

What are the benefits of rich source of vitamin c and antioxidants in Australian Finger Lime?

Australian Finger Limes are packed with essential nutrients, most notably vitamin C, which acts as a powerful antioxidant supporting immune function, collagen production, and skin health. The unique juice vesicles also provide dietary fiber and various beneficial plant compounds that help combat oxidative stress in the body. Incorporating these nutritious citrus pearls into your daily diet enhances both the flavor and nutritional profile of seafood, salads, and gourmet dishes without adding excessive calories or sodium.

Precautions: Individuals with citrus allergies or severe acid reflux should consume finger limes in moderation to avoid potential allergic reactions or gastrointestinal discomfort.

Key Nutrients / Compounds

Vitamin C rich in 28 mg / 100g

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