Bitter Orange
Citrus aurantium
Seville
About this plant
Citrus aurantium, commonly called bitter orange or Seville orange, is a small to medium-sized tree known for its sour, bitter fruit. The fruit is often used in marmalades, flavorings, and traditional medicines. The tree has glossy green leaves and fragrant white flowers. It is valued both for its ornamental appeal and its culinary uses.
Taxonomy
- Genus
- Citrus
- Family
- Rutaceae
- Higher classification
- Sapindales
- Plant type
- Tree
- Lifespan
- Perennial
Origin & Distribution
- Native region
- Southeast Asia, possibly India or China
- Distribution
- Widely cultivated in Mediterranean regions, parts of Asia, and subtropical areas worldwide.
Care
- Light preference
- Full sun
- Suitable locations
- Outdoor, Greenhouse, Balcony
- Preferred window facing
- South-facing, West-facing
- Watering frequency
- Moderate
- Watering interval
- 5–10 days
- Humidity
- Normal
- Minimum
- -3 °C
- Maximum
- 35 °C
- Optimal
- 18-28 °C
- USDA hardiness zones
- 9-11
- Soil pH
- 6.0-7.5
- Soil type
- well-draining loam or sandy soil
Watering. Water regularly to keep soil moist but not waterlogged. Allow the top inch of soil to dry out between waterings.
Fertilizing. Feed the tree with a balanced citrus fertilizer every 6 to 8 weeks during the growing season (spring through summer). Avoid fertilizing in winter when the tree is dormant.
Bitter orange trees are moderately easy to care for but need plenty of sunlight and well-draining soil. They can suffer if overwatered or grown in poor light. Regular watering and occasional fertilizing help keep the tree healthy.
Propagation
- Propagation methods
- Seeds, Cuttings, Grafting
- Care difficulty
- Medium
Ornamental features
- Flowering
- Yes
- Flowering period
- spring
Glossy dark green leaves, fragrant white flowers, and bright orange fruit.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Mildly toxic
- Weed potential
- Not considered a weed
The fruit and leaves are generally safe, but the peel oils can irritate skin. Keep away from pets and children to avoid accidental ingestion of bitter peel or seeds.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Pollen, Skin contact
- Pollen level
- Low
Citrus aurantium, also known as bitter orange, can produce pollen that may cause mild allergic reactions in sensitive individuals, such as sneezing or itchy eyes. The fruit's peel contains oils that might irritate the skin for some people. To reduce exposure, avoid direct contact with the peel oils and keep the plant in a well-ventilated area during flowering.
Common problems
Common problems include root rot from overwatering, leaf yellowing due to nutrient deficiencies, and occasional pest issues like aphids or scale insects.
Uses
Used ornamentally and for its bitter fruit in marmalades, flavorings, and traditional remedies.
Notes
Prune lightly after flowering to maintain shape and remove dead wood. Repot young trees every 2-3 years. Protect from frost in colder climates.