Clethra Barbinervis
Clethra Barbinervis

Clethra Barbinervis

£16.99

Out of stock

SKU: clethra-barbinervis Category:
Common Name: Japanese Clethra
Size: 2-3 LITRE
Hardiness: H5
Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees ˚C) are shown in brackets

  • H1a: under glass all year (>15˚C)
  • H1b: can be grown outside in the summer (10 - 15 ˚C)
  • H1c: can be grown outside in the summer (5 - 10 ˚C)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5 ˚C)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1 ˚C)
  • H4: hardy through most of the UK (-10 to -5 ˚C)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10 ˚C)
  • H6: hardy in all of UK and northern Europe (-20 to -15 ˚C)
  • H7: hardy in the severest European continental climates (< -20 ˚C)
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This plant has won a RHS award

2-3 Litre pot

  • RHS Award of Garden Merit
  • Position: Partial shade
  • Soil: Moist, well drained
  • Growth rate: Average
  • Flowering period: August – September
  • Hardiness: H5
  • Eventual height: 2.5m
  • Eventual spread: 2.5m

Clethra Barbinervis, commonly known as ‘Japanese Clethra’ is a deciduous shrub with attractive brown/orange bark that is native to Japan. It is known for its beautiful, fragrant white flowers that bloom in late Summer through to Autumn and its attractive, glossy green foliage. The shrub can reach a height of up to 2.5 metres and is an ideal choice for hedgerows, borders, and woodland gardens.

In the UK, Clethra Barbinervis is a popular choice for gardeners due to its hardiness and ability to thrive in a variety of soil types. It is also tolerant of partial shade making it a versatile addition to any garden. The shrub prefers moist, well-drained soil and should be protected from strong winds. It is a good idea to mulch around the base of the shrub to retain moisture and to keep the roots cool during hot weather.

How to care for your Clethra Barbinervis

  1. Planting location: Prefers moist, well-drained soil and can tolerate both shade and full sun. However, it is best to plant it in a location that receives partial sun to protect the delicate flowers from scorching.
  2. Watering: Keep the soil consistently moist, but not waterlogged. During hot weather, it is a good idea to water the shrub more frequently to ensure that the roots do not dry out.
  3. Mulching: Mulch around the base of the shrub to retain moisture and to keep the roots cool. This will also help to suppress weeds and keep the area around the shrub looking tidy.
  4. Pruning: Does not require pruning, but if you wish to shape the shrub or remove any damaged or diseased branches, it is best to do it after the blooming period.
  5. Fertilising: Does not require fertiliser, but you can add a slow-release fertiliser in the Spring to promote growth and blooming.

By following these simple care tips, your Clethra Barbinervis should thrive in the UK and provide you with beautiful, fragrant flowers for many years to come.

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