Shrubs, trees and climbers

Mexican orange blossom

ChoisyaRutaceae
Also: Choisya, Mexican orange
AT A GLANCE
Part shade Water: average H4down to −10 °C 1.5–2.5 m tall · 1.5–2.5 m wide In a pot: yes
Flowering · UK
Flowering · Northern Italy
Flowering · Central Italy
Flowering · Southern Italy and islands

Shelter from cold, drying winds while young, particularly in the first winter, until the root system is established.

Care

Light

Sheltered from cold winds.

Water

Once established.

Soil

Well-drained soil of most types, including chalky/alkaline.

Pruning

Trim lightly after the main spring flowering; can be cut back hard if it outgrows its space, and reshoots well.

Feeding

One general feed with a mulch in spring. The golden-leaved forms are the exception worth watching: too much nitrogen turns them a duller green and loses the colour they were chosen for.

Propagation

Semi-ripe cuttings in late summer root reliably in gritty compost under cover. Take a few whenever you prune, since a hard winter can scorch an established plant badly.

Month by month

Months change with the climate: in southern Italy tomatoes go out two months earlier than in England.

  1. MarchLight feed as growth resumes. how ›
  2. MayTrim lightly after main flowering. how ›
  3. SeptemberOften produces a second, smaller flush of flowers in autumn.

Months based on climate: UK. Your choice stays on this device.

  1. MarchLight feed as growth resumes. how ›
  2. MayTrim lightly after main flowering. how ›
  3. SeptemberOften produces a second, smaller flush of flowers in autumn.

Months based on climate: Northern Italy. Your choice stays on this device.

  1. FebruaryLight feed as growth resumes. how ›
  2. AprilTrim lightly after main flowering. how ›
  3. SeptemberOften produces a second, smaller flush of flowers in autumn.

Months based on climate: Central Italy. Your choice stays on this device.

  1. FebruaryLight feed as growth resumes. how ›
  2. AprilTrim lightly after main flowering. how ›
  3. SeptemberOften produces a second, smaller flush of flowers in autumn.

Months based on climate: Southern Italy and islands. Your choice stays on this device.

Common problems

Frost damage to young growthfull sheet ›

How to spot it. In a cold spring.

What to do. Avoid feeding late in the season, which encourages vulnerable soft growth.

Scale insectsfull sheet ›

How to spot it. On stems.

What to do. Treat if noticed.

How to spot it. In wet conditions.

What to do. Improve airflow.

Popular varieties

Choisya ‘Aztec Pearl’AGM1.5–2.5 m × 1.5–2.5 m · April–May, AugustApril–May, AugustMarch–April, AugustMarch–April, August
Choisya ‘Sundance’1.5–2.5 m × 1.5–2.5 m · April–MayApril–MayMarch–AprilMarch–April
Choisya ‘White Dazzler’AGM1–1.5 m × 1–1.5 m · April–May, AugustApril–May, AugustMarch–April, AugustMarch–April, August

Questions

Mexican orange blossom: is it hardy?

H4: Hardy through an average UK winter. It survives down to −10 °C.

Can it grow in a pot?

For a few years while young.

Mexican orange blossom: when do you prune it?

Trim lightly after the main spring flowering; can be cut back hard if it outgrows its space, and reshoots well. In the calendar for UK, pruning falls in May.

Mexican orange blossom: when does it flower?

In the climate of UK it flowers in April–May, September.

When do you feed it?

One general feed with a mulch in spring. The golden-leaved forms are the exception worth watching: too much nitrogen turns them a duller green and loses the colour they were chosen for. Feeding months, UK: April.