Blood orange 'Moro'

Sun

Full sun, ideally at least 6-8 hours daily, with shelter from cold and drying winds.

Water

Water deeply when the upper soil begins to dry; keep developing fruit supplied with moisture without leaving roots waterlogged.

Soil

Well-drained, slightly acidic to neutral soil; use a free-draining citrus potting mix in containers.

Height

12-25 ft (3.7-7.6 m), depending on rootstock; smaller in containers

Spread

10-20 ft (3-6.1 m), depending on rootstock and pruning

Flowers

Mainly spring; fragrant white flowers, sometimes followed by scattered blooms later.

Foliage

Evergreen. Glossy, dark green, oval leaves with an aromatic scent when crushed.

Growth

Moderate in warm conditions; slow in cool climates.

Care needed

Medium

• Pollinators
• Heat tolerant
• Low allergen
• Fragrant
• Edible

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Hard

Toughness

Needs looking after

Pick your zone, country, light and whether you have pets.

1. Planting day

   7 ft (2 m)

2. After 1 year

   7 ft (2.1 m)

3. After 2 years

   7 ft (2.3 m)

4. After 3 years

   8 ft (2.4 m)

5. After 5 years

   9 ft (2.7 m)

About 26 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Toxic

Growth rate

Slow

• Plant with the graft union above soil level in a sunny position sheltered from wind.
• Water deeply, then let the upper soil begin to dry; empty container saucers after watering.
• Feed with citrus fertiliser during spring and summer, following the label; avoid feeding a cold, inactive tree.
• Apply organic mulch over the root area, keeping it clear of the trunk.
• Move container trees into a bright, frost-free space before frost; reduce watering in winter without letting the root ball dry out.

Pruning. Prune lightly in spring after the main harvest and once frost risk has passed, removing dead, damaged or crossing branches. Remove shoots below the graft promptly, and avoid hard pruning, which reduces fruiting and can expose bark to sunburn.

Pick fruit in winter to early spring, depending on climate, when a sample tastes sweet enough; skin colour and red flesh alone do not reliably indicate ripeness. Clip fruit off with secateurs, since oranges do not become sweeter after picking. A grafted tree commonly gives its first worthwhile crop about 3-5 years after planting, although rootstock, tree size and growing conditions affect this.

Spring

After frost risk passes, plant or repot, begin feeding and gradually acclimatise overwintered trees to outdoor sun.

Spring

After the main harvest, remove dead or crossing wood and any shoots below the graft.

Summer

Water consistently during fruit growth and continue feeding according to the fertiliser label.

Summer

Check leaf undersides and young shoots for scale, mites and aphids.

Autumn

Prepare frost protection and bring container trees under cover before freezing weather.

Winter

Taste-test ripening fruit and harvest selectively; water protected trees sparingly but do not let their roots dry out.

• Use as a productive evergreen focal point in a sheltered courtyard.
• Grow in a large container beside a sunny terrace, with access to winter shelter.
• Plant in a small citrus orchard with room for light and airflow around each canopy.
• Combine with Mediterranean herbs nearby, keeping their drier planting pockets separate from the irrigated citrus root zone.

Garden styles it suits: Mediterranean, Modern Mediterranean, Modern courtyard, Potager (kitchen garden), Backyard orchard and Edible landscape.

Plant it with: Lavender, Rosemary, Thyme, Oregano, Sweet alyssum and Calendula.

Wildlife: Flowers provide nectar and pollen for bees. A single tree can set fruit without another orange variety, although insects commonly visit the flowers.

• Scale insects and sooty mould: inspect stems and leaf undersides, control ants and treat scale with a locally approved horticultural oil, following temperature restrictions on the label.
• Spider mites: look for fine webbing and stippled leaves, especially under cover; rinse foliage and use a labelled mite treatment if needed.
• Root rot: prevent standing water, improve drainage and keep soil and mulch away from the trunk.
• Poor fruit colour or flavour: provide full sun and enough warmth for ripening; red pigmentation needs cool nights, but protect the tree from frost.

The flesh is edible for people, but seeds should not be eaten. Peel, leaves, stems and their essential oils contain compounds toxic to cats, dogs and horses; chewing them can cause digestive upset, and contact may irritate skin. Concentrated citrus oils pose a greater risk than a small accidental exposure.

• Tarocco blood orange (Citrus × sinensis 'Tarocco')

  Often has less deeply pigmented flesh and a sweeter flavour, but colour varies with climate and is not a reliable identification by itself; check the nursery label.

• Sanguinelli blood orange (Citrus × sinensis 'Sanguinelli')

  Usually ripens later than 'Moro' and often has conspicuous red blush on the rind; appearance overlaps, so provenance matters.

• Cara Cara navel orange (Citrus × sinensis 'Cara Cara')

  Has pink rather than deep blood-red flesh and usually a visible navel at the blossom end; its pink pigment is different from that of blood oranges.

The common name blood orange refers to the red anthocyanin pigments that colour the flesh and sometimes the rind.

Propagation. Propagate by budding or grafting onto a suitable citrus rootstock; buy certified healthy plants where available. Seedlings are slow to fruit and are not a reliable way to preserve 'Moro'; citrus plant movement is restricted in some regions to prevent disease spread.

Accepted botanical name

Citrus aurantium Citrus × sinensis 'Moro' is an older name for Citrus aurantium.

Sources: GBIF (CC BY 4.0). The care and design notes are LandscapeGPT's own.