Finger Lime
citrus australasica
Also known as: ["Australian Finger Lime","Citrus australasica"]
Overview
A small, thorny evergreen tree native to the rainforests of Australia, known for its cylindrical, lime-like fruits containing tiny juice vesicles.
Benefits & Perks
["edible fruits","medicinal use","culinary herb","aesthetic foliage","wildlife attractant (bees, butterflies, birds)"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Sapindales |
| Family: | Rutaceae |
| Genus: | Citrus |
| Botanical Name: | Citrus australasica |
Plant Characteristics
Basic Information
- Category: Fruits
- Suitable Location: indoor pot or sheltered outdoor spot with protection from strong winds
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"10–30°C"}
- Hardiness: {"zones":"9–11"}
- Misting: every 2–3 days to maintain humidity, especially indoors
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, slightly acidic soil mix with organic matter, such as a blend of potting soil, sand, and perlite.
Maintenance Level
- Maintenance Level: moderate
- Toughness Level: moderate
- Pruning Frequency: Annually in late winter or early spring before new growth begins; light pruning can be done as needed year-round.
- Pruning Intensity: Moderate; remove up to one-third of old growth if necessary, but avoid heavy pruning on young plants
Care Details
Ideal Sunlight Coverage:
Bright indirect light for 6–8 hours daily; can tolerate some direct morning sun but avoid harsh afternoon sun.
Sunlight Tolerance Tips:
Acclimate gradually to direct sun to prevent scorching; place indoors near a south-facing window with sheer curtains; move outdoors in spring/summer for optimal growth.
Care Requirements
Care Difficulty
moderatemoderate
Sunlight
full sun to partial shade
Rotate plant weekly for even light exposure; use sheer curtains to filter intense sunlight; avoid placing near heat sources that can intensify light.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly until it drains from the bottom, allow soil to dry slightly between waterings, avoid overhead watering to prevent fungal issues.
Soil
well-draining, slightly acidic potting mix
pH: 5.5–6.5 (slightly acidic).
Use a pot with drainage holes; avoid compacted soil; check moisture before watering; amend with organic matter if needed.
Temperature
Prefers 65–85°F (18–29°C); cooler temperatures (50–60°F or 10–15°C) during dormancy in winter.
Avoid sudden temperature fluctuations; protect from drafts; maintain consistent indoor temperatures.
Fertilizing
every 4–6 weeks during spring and summer with balanced liquid fertilizer
Fertilize after watering to prevent root burn; flush soil occasionally to prevent salt buildup; use a citrus-specific fertilizer for best results.
Propagation
Methods
Stem cuttings or air layering; stem cuttings are more common for home growers.
Step-by-Step Propagation Guide
- Take a 4–6 inch cutting with at least 2 nodes.
- Remove lower leaves.
- Dip in rooting hormone.
- Plant in moist medium.
- Maintain humidity.
Best Time: Spring or early summer when the plant is actively growing.
Environment
High humidity (70–90%), warm temperatures (70–75°F or 21–24°C), and indirect light.
Medium
Well-draining mix of peat, perlite, and sand or a cactus/succulent mix.
Hormone
Rooting hormone is recommended to improve success rates.
Timeline
Roots may develop in 4–8 weeks; new growth typically appears after 2–3 months.
Tools Needed
Pruning shears, rooting hormone, small pots, plastic bags or propagation dome, misting bottle.
Quick Tips
Use healthy, non-flowering stems; keep soil consistently moist but not waterlogged; provide bottom heat if possible.
Pruning & Repotting
Pruning Guide
Method
Use clean, sharp tools; make cuts just above a leaf node or branch junction; remove crossing or inward-growing branches.
Pruning Plan
Prune to maintain shape, encourage bushier growth, and remove dead or diseased wood; focus on structural improvement and airflow.
Tools
Pruning shears, loppers (for larger branches), sterilizing solution (e.g., rubbing alcohol).
Checklist
Sterilize tools; prune during dormancy; remove dead/diseased wood first; shape evenly; clean up debris afterward.
Repotting Guide
Best Season
Early spring before active growth starts.
Pot Size
Choose a pot 1–2 inches larger in diameter than the current one; ensure it has drainage holes.
Method
Remove plant gently; trim any circling roots; place in a new pot with fresh soil mix; water thoroughly after repotting.
Suggestions
Repot every 2–3 years or when roots fill the pot; necessary to refresh soil and provide space for growth.
Checklist
Select appropriate pot size; prepare new soil mix; gently remove plant; inspect roots; prune if needed; repot carefully; water and place in shade for a few days.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture before watering; water deeply; ensure drainage; adjust frequency seasonally.
How to Apply Water Properly
Water directly at the root zone, ensure water penetrates deeply to reach the root ball, allow excess water to drain completely, water in the morning to reduce evaporation and fungal risk.
Watering Schedule Tips
Water deeply once the top inch of soil is dry; reduce frequency in winter to prevent root rot.
Soil Improvement
Add perlite or coarse sand for drainage; incorporate compost or peat moss for fertility and acidity; ensure pots have adequate drainage holes.
Temperature Stress Management
Signs of Temperature Issues
Yellowing leaves, leaf drop, stunted growth, or browning leaf edges.
Cold Stress
Low temperatures slow growth, cause leaf drop, and can lead to root damage or death if below 50°F (10°C).
Solution: Move to a warmer location, insulate pots with bubble wrap, avoid placing near drafty windows or doors, protect from frost.
Hot Stress
Excessive heat causes wilting, leaf scorch, reduced flowering, and increased water demand.
Solution: Provide shade during peak sun, increase humidity with misting or pebble trays, water more frequently but avoid waterlogging.
Fertilizing Guide
Fertilizing Checklist
Check fertilizer type; dilute correctly; apply during active growth; avoid winter feeding.
Fertilizing Method
Use a balanced liquid fertilizer diluted to half strength every 4–6 weeks during spring and summer; reduce or stop in fall and winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicCitrus australasica is generally considered non-toxic to cats. The fruit is safe for consumption in moderate amounts.
⚡ Toxic If:
not applicable
Dogs
Non-toxicCitrus australasica is generally considered non-toxic to dogs. The fruit is safe for consumption in moderate amounts.
⚡ Toxic If:
not applicable
Humans
Slightly ToxicThe seeds of Citrus australasica contain small amounts of compounds that can cause mild gastrointestinal discomfort if ingested in significant quantities. The fruit itself is generally safe for consumption.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten in large quantities
Frequently Asked Questions
Q: What are the uses of Finger Lime?
A: The fruit's juice vesicles are used in gourmet cuisine, beverages, and as a garnish. The plant also has traditional medicinal uses.
Q: How do I care for a Finger Lime tree?
A: Provide well-drained soil, full sun to partial shade, and regular watering. Protect from frost and pests.
Q: Is Finger Lime safe for pets?
A: Yes, it is non-toxic to dogs and cats.
Quick Reference
| Family: | Rutaceae |
| Care: | moderate |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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