Can I grow a Key lime in a pot?

Yes, they do well in containers if you provide plenty of sunlight and regular feeding.

Why are my leaves turning yellow?

This is often a sign of nutrient deficiency, specifically nitrogen or iron, or poor drainage.

Plant guide

Key lime.

Citrus aurantiifolia

Pronounced SIT-rus aw-ran-tee-ih-FOH-lee-uh

Also known as Egyptian lime, Indian lime, Key lime, Lime, Mexican lime, West Indian lime, colo

The Key lime is a lovely citrus tree that produces small, fragrant flowers and tart, aromatic fruit. It thrives in warm climates and makes a wonderful container plant if you give it enough sun. You will love the fresh scent of its blossoms in your home.

At a glance

Care level: Moderate
Plant type: Evergreen fruit tree
Light: Full sun
Indoor light: Direct sun
Water: Every 3 to 7 days
Mature size: 6 to 13 feet
Growth rate: Medium
Hardiness: USDA 9 to 11
Bloom time: Spring to summer

Care

Keep your tree in the sunniest spot you have, as it needs plenty of light to produce fruit. Watch for yellowing leaves, which often signal overwatering or a nutrient deficiency. Ensure your pot has excellent drainage to keep the roots happy and healthy.

Watering: Water deeply when the top inch of soil feels dry to the touch.
Feeding: Use a balanced citrus fertilizer during the active growing season.
Pruning: Prune lightly in late winter to maintain shape and remove dead branches.
Repotting: Move to a slightly larger pot only when the roots become crowded.
Soil: Well-draining, slightly acidic potting mix
Soil pH: 6.0 to 7.0
Temperature: 10 to 35°C
Humidity: 50 to 70%
Drought tolerance: Low
Lifespan: Perennial, typically 15 to 25 years in good conditions.
Fragrance: Strong
Deer and rabbits: Moderate

Signs it needs repotting

Roots growing out of the drainage holes
Water sitting on the surface for too long
Stunted growth during the active season

Safety

People: The essential oils in the peel and leaves can cause photosensitivity if they come into contact with skin exposed to sunlight.
Pets: The essential oils in the leaves and fruit can cause irritation if ingested by cats or dogs.
Children: The branches often have sharp thorns that can scratch or poke small children.
Contact allergens: Contact with the sap or essential oils from the rind can cause skin irritation or phytophotodermatitis.
Airborne allergens: The fragrant flowers may cause mild respiratory irritation in sensitive individuals.
Edibility: The fruit is edible, but avoid consuming the peel if it has been treated with non-food-safe pesticides.

How to identify it

Small, round, yellow-green fruit
Glossy, evergreen, oval leaves
Small, white, fragrant star-shaped flowers
Branches often feature sharp thorns

Height: 2 to 5m
Spread: 2 to 4m
Leaves: green, evergreen
Flowers: white, 2 to 3cm
Fruit: green, yellow, Year round in tropical climates

Problems to watch for

Citrus canker · A bacterial disease that causes lesions on leaves, stems, and fruit.
Aphids · Small insects that suck sap from new growth and can spread viruses.

By symptom

Plant problems by symptom

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Growing it

Propagation: cuttings, grafting
When to plant: spring
Overwintering: Move containers indoors before the first frost. Keep the tree in a bright, cool room and reduce watering significantly until spring.
In containers: They grow well in containers, provided you use a pot at least 40 centimeters wide with excellent drainage.

Cuttings

Take a 15 centimeter cutting from healthy green wood.
Remove the lower leaves and dip the cut end in rooting hormone.
Place in a moist, well-draining potting mix and cover with a plastic bag to maintain humidity.

Planting aromatic herbs nearby can help mask the scent of the tree from certain pests.

Grows well with

Lavender · Lavender attracts pollinators that help with fruit set.
Nasturtium · Nasturtiums act as a trap crop for aphids.

Similar species

Persian Lime · A larger, more cold-hardy lime variety commonly used as a substitute.

Science

Family: Rutaceae
Genus: Citrus
Order: Sapindales
Class: Magnoliopsida
Native range: Southeast Asia
Conservation: Not of conservation concern.

It thrives in tropical environments with high rainfall and consistent warmth.

Value to wildlife: nectar source, larval host plant
Pollinators: bees, butterflies
Uses: culinary flavoring, beverages, essential oils, ornamental tree

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 2/9
Soil reaction: 6/9
Light: 8/9
Temperature: 8/9
Moisture: 6/9
Nutrients: 7/9

Taxonomy resolved against GBIF.

Questions people ask

Can I grow a Key lime in a pot?: Yes, they do well in containers if you provide plenty of sunlight and regular feeding.
Why are my leaves turning yellow?: This is often a sign of nutrient deficiency, specifically nitrogen or iron, or poor drainage.

Where the name comes from

The specific epithet aurantiifolia means orange-leaved, referring to the leaf shape, while the common name refers to the Florida Keys where it became naturalized.

Good to know

Key limes were once a major export crop in the Florida Keys.
The fruit is usually picked while still green, although fully ripe Key limes turn yellow and become juicier.
Key lime trees are more sensitive to cold than most other citrus varieties.

Also in

Plants toxic to cats and dogs

Keep your key lime growing

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This guide was generated with AI on October 19, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.