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HYDRANGEA arborescens 'Grandiflora'

Commonly known as Sevenbark

Hardy variety with cone-shaped white flowerheads
Further Reading....


Estimated availability autumn 2021 - Not yet confirmed. Could be any time between September and December.
£15.00 each 

Delivery Information Estimated availability autumn 2021
plant size comparison icon 2 to 3 Litre

 

  • Deciduous - long-stalked, broad leaves to 18cm (7in) long, dark-green above, paler beneath.
  • White
  • Height - 2m (6½ft)
  • Spread - 2m (6½ft)
  • Medium shrub - Typically grow to around 4-6 feet in height - large flowerheads to 15cm (6in) with large sterile flowers.
  • Hardy - cold winter - Hardy in most places throughout the UK even in severe winters. May not withstand open/exposed sites or central/northern locations. Plant can withstand temperatures down to -15°C (5°F)
  • Full sun - shelter from cold, dry winds.
  • Partial shade
  • Harmful if eaten - These will give you an upset tummy, so please don't eat any of these.
  • May cause skin allergy or irritant - Having skin or eye contact with these plants could result in an allergic reaction, burning or rash.
  • Additional Features - Good to know - - flowers on new wood. Prune to lowest pair of healthy buds to create a low framework of branches. Neglected plants can be hard-pruned.
  • Pests & Diseases - red spider mites, scale insects, vine weevils, capsid bugs, grey mould(Botrytis), hydrangea virus, powdery mildew, leaf spot, honey fungus.
  • Place of origin - eastern USA.
  • Burncoose Specialities - Hydrangeas -
  • Hardiness - Fully hardy -
  • Leaf margin - Serrate - see photos above
  • Leaf shape - Ovate - see photos above
  • Pruning group - Pruning group 1
    Suitable for: Deciduous and evergreen trees, and some deciduous shrubs.
    Pruning: Minimal pruning required. Prune wayward or crossing branches to maintain a healthy framework.
    When: When dormant in the late winter/early spring. Some in the summer/autumn to prevent bleeding of sap.

    RHS group 1
  • Seasonal Interest - Summer -
  • Soil Conditions - Fertile moist well-drained soil - - humus-rich.
  • Wildlife - Rabbit Resistant -
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2m (6½ft)
Medium Shrub - guide for size not form Average Person
  2m (6½ft)
 

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