Mandarin

Sun

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

Water

Water deeply, then let the upper soil begin to dry before watering again. Container plants need more frequent checks, especially in hot or windy weather; reduce watering during cool winter conditions.

Soil

Well-drained loam or citrus potting mix, ideally slightly acidic. Avoid waterlogged ground, deep planting and persistently wet compost.

Height

10-20 ft (3-6 m); usually smaller on dwarfing rootstocks or in containers

Spread

10-15 ft (3-4.5 m); usually smaller in containers

Flowers

Usually spring: small, fragrant white flowers, sometimes followed by scattered flowers later in the year.

Foliage

Evergreen. Glossy, dark green, oval to lance-shaped leaves with narrow or scarcely winged leaf stalks.

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

Moderate

Toughness

Fairly tough

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 (2.2 m)

4. After 3 years

   8 ft (2.3 m)

5. After 5 years

   8 ft (2.5 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 root flare at soil level and keep the graft union above the soil.
• Water the root zone thoroughly without leaving the soil saturated; empty container saucers after watering.
• Apply a citrus fertiliser containing trace elements during active growth, following the label; do not feed a dormant, cold-stressed tree.
• Mulch the root area, leaving a clear gap around the trunk.
• Protect young trees from frost; move containers into bright, frost-free shelter before freezing weather.
• Remove shoots growing from below the graft union.

Pruning. Prune lightly after harvest, once serious frost risk has passed, removing dead, damaged and crossing branches. Avoid heavy pruning, which removes fruiting wood and can expose the trunk and branches to sunburn.

Pick mandarins mainly from autumn to early spring—roughly October–March in the US, UK and Canada, and April–September in Australia, depending on variety; UK and most Canadian gardens need protected or indoor overwintering. Harvest full-sized fruit that yields slightly and tastes sweet, since skin colour alone is unreliable and mandarins do not sweeten after picking; clip the stalk rather than pulling.

Late winter

Check sheltered container plants for scale insects and keep watering modest without allowing the root ball to dry completely.

Spring

Begin feeding as growth starts; repot container plants if roots have filled the pot.

Late spring

Move overwintered plants outdoors after frost risk has passed, gradually increasing their exposure to direct sun.

Summer

Check soil moisture frequently and inspect new shoots for citrus leafminer and sap-feeding insects.

Autumn

Prepare frost protection and move container plants under cover before freezing nights.

Autumn to spring

Harvest according to cultivar and local season; taste a fruit to judge sweetness because rind colour alone does not reliably show ripeness.

• Use as a small specimen tree beside a sunny terrace, where flowers and fruit can be enjoyed close up.
• Grow a dwarf-rootstock tree in a large, well-drained container for a courtyard or patio.
• Include in a home orchard or edible border, leaving access around the canopy for harvesting.
• Pair with low herbs outside the main watering basin to keep the trunk clear and avoid root competition.

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

Plant it with: Chives, Thyme, Nasturtiums and Sweet alyssum.

Wildlife: Flowers provide nectar and pollen for bees and other insects. Fallen fruit may attract rodents, so collect it promptly.

• Scale insects and mealybugs: inspect stems and leaf undersides; remove small infestations by hand or use a labelled horticultural oil, avoiding hot weather and following application restrictions.
• Citrus leafminer: winding trails distort young leaves; avoid excessive nitrogen and unnecessary pruning that encourages repeated soft growth. Established trees usually tolerate modest damage.
• Root rot: yellowing and decline can follow waterlogging; improve drainage, keep the trunk base dry and never leave pots standing in water.
• Citrus greening disease, also called huanglongbing: uneven blotchy yellowing, misshapen fruit and persistent decline need professional diagnosis. There is no cure; contact your local plant-health authority and do not move suspect plants or propagation material.

Ripe fruit flesh is edible and is not known to be toxic to people. Leaves, peel and concentrated citrus oils can be toxic to cats and dogs, causing digestive upset or skin irritation; concentrated oils pose a greater risk. Toxicity to horses is not well established, so keep prunings and citrus oils away from them.

• Sweet orange (Citrus × sinensis)

  Usually has larger, rounder fruit with a more tightly attached rind; mandarin fruit is often flattened and easier to peel.

• Satsuma (Citrus unshiu)

  A closely related mandarin commonly sold separately, usually with very loose skin and few or no seeds. Fruit and foliage overlap enough that a reliable cultivar label is the best guide.

• Clementine (Citrus × clementina)

  A mandarin hybrid with small, sweet fruit, often seedless when grown without compatible pollinisers. Appearance overlaps with mandarins, so identification usually depends on the plant's label.

The botanical epithet reticulata means netted, referring to the net-like fibrous tissue beneath the fruit's rind.

Propagation. Usually propagated by budding or grafting onto a suitable citrus rootstock. Seed-grown trees take several years to fruit and may differ from the parent; use certified disease-free plants and observe local citrus movement restrictions.

Accepted botanical name

Citrus reticulata

In the US and Canada

Introduced in the lower 48 states, Pacific Basin and Puerto Rico.

Native range

China Southeast.

Measured

Average height 600 cm.

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