How to Grow Orange
Citrus sinensis
Orange trees must be grown in containers in the UK and brought indoors over winter to a bright, cool room at 7-12C. Use free-draining citrus compost, water when the top dries out, and feed fortnightly with citrus fertiliser from spring to autumn. Give maximum light year-round and move outdoors to full sun in summer. Watch for scale insects and mealybug, and avoid overwatering in winter which is the main cause of citrus death in the UK.
Yearly Lifecycle
Care Essentials
Citrus fertiliser every 2–4 weeks during the growing season. Reduce in winter.
Watch For
- Scale insects
- Mealybug
- Red spider mite
- Leaf drop from cold or overwatering
Companions
Basil, Lavender, Marigolds
Track your Orange care schedule — pruning, feeding, and seasonal tasks
Start planning freeCare Requirements
☀️ Light
Maximum light year-round; full sun in summer
Bright, direct light is essential. In the UK, place outdoors in full sun during summer and in the brightest room available over winter.
💧 Watering
Water when top dries; reduce in winter
Water when the top 2cm of compost is dry. Reduce watering significantly in winter. Never let pots sit in water — citrus roots rot easily.
🌱 Fertilizing
Citrus feed fortnightly spring-autumn
Feed with a specialist citrus fertiliser every 2-4 weeks from spring to autumn. Reduce to monthly in winter. Citrus are hungry plants.
✂️ Pruning
Light spring shaping; remove suckers
Light shaping in spring. Remove dead wood, crossing branches, and suckers below the graft. Thin to maintain an open canopy for light penetration.
❄️ Overwintering
Bright cool room (7-12C) over winter
Bring indoors before first frost to a bright, cool room (7-12C). Avoid warm, dry centrally heated rooms. Ventilate on mild days.
Growing Tips
Free-draining compost
Use specialist citrus compost with added perlite and never let pots sit in saucers of water.
Summer out, winter in
Move outdoors to full sun after the last frost and bring back inside before the first frost to a bright, cool room.
Feed regularly
Feed fortnightly with a specialist citrus fertiliser during the growing season; citrus are hungry plants.
Watch for pests indoors
Check regularly for scale insects and mealybug, especially on overwintered plants indoors.
Pests & Diseases
Pest Scale Insects
Identification: Small brown or white waxy bumps on stems and leaf undersides; sticky honeydew and sooty mould on foliage
- Wipe off with a damp cloth or cotton bud dipped in methylated spirit
- Spray with plant oil-based winter wash during dormancy
- Apply systemic insecticide containing acetamiprid in spring
Pest Mealybug
Identification: White cottony masses in leaf axils, on stems, and around fruit stalks; sticky honeydew and sooty mould
- Dab with methylated spirit on a cotton bud
- Introduce Cryptolaemus montrouzieri ladybird as biological control under glass
- Spray with fatty acid-based insecticide, ensuring thorough coverage of hidden areas
Pest Red Spider Mite
Identification: Fine webbing on leaf undersides; leaves develop pale stippling and may bronze and drop
- Mist foliage regularly to raise humidity
- Introduce Phytoseiulus persimilis predatory mites under glass
- Spray with plant oil-based miticide, repeating every 7 days
Disease Sooty Mould Capnodium spp.
Symptoms: Black powdery or crusty coating on leaves and stems, growing on honeydew excreted by sap-sucking insects
Treatment: Wipe leaves clean with a damp cloth; control the underlying pest (scale, mealybug, or whitefly)
Prevention: Monitor and treat sap-sucking pests promptly; improve ventilation around the plant
Disease Root Rot Phytophthora spp.
Symptoms: Yellowing leaves, wilting despite wet compost, dark mushy roots; tree declines and may die
Treatment: Repot into fresh, free-draining citrus compost; trim away rotten roots; reduce watering
Prevention: Use well-draining compost with added perlite; never let pots sit in water; water only when top 2cm is dry
Disease Citrus Gummosis Phytophthora citrophthora
Symptoms: Amber gummy resin oozing from bark on the trunk or branches; bark may crack and peel; branch dieback
Treatment: Cut out affected bark to healthy tissue; allow to dry; improve drainage and reduce watering
Prevention: Avoid trunk damage; ensure excellent drainage; do not bury the graft union when potting
Popular Varieties
Navel
A large, seedless eating orange with a characteristic "navel" formation at the blossom end. Peels easily and separates into segments cleanly.
Valencia
The premier juice orange, containing few seeds and a high juice content. Ripens in the summer, making it unique among oranges.
Blood
A dramatic orange with deep ruby-red flesh caused by anthocyanin pigments. The Moro and Sanguinello types offer intense berry-like flavour notes alongside citrus.
Washington Navel
The original navel orange cultivar, seedless with a rich, complex sweet flavour. Large fruit that peels easily, making it the definitive eating orange worldwide.
Seville
The classic bitter orange, indispensable for marmalade making. Too sour to eat fresh but prized for preserves, its aromatic peel, and orange blossom water.
Cara Cara
A navel orange sport with distinctive pink-red flesh and a sweeter, less acidic flavour with cranberry and cherry undertones. Seedless and easy to peel.
Tarocco
An Italian blood orange considered the sweetest of all oranges. Less intensely pigmented than Moro but with superior flavour and high vitamin C content.
Trovita
A thin-skinned, juicy orange that tolerates more heat and cold than most varieties. Few seeds and good sweetness, suitable for container growing.
Calamondin
A compact ornamental citrus (technically a kumquat-mandarin hybrid) ideal for indoor growing. Produces masses of small, sour decorative fruit year-round.
Spacing & Planting
| Plant spacing | 450 cm |
| Row spacing | 500 cm |
| Mature height | 400 cm |
| Mature spread | 300 cm |
Semi-dwarf 4-5m apart. Standard trees 6-7m. Dwarf varieties 2-3m.
Log Orange in your garden — track growth, care, and harvests year after year
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