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Rhododendron Brian Howell EX 4894

Item: HBRIH

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Flowering Month:
April-May
Flower Colour:
White
Hardiness:
To -10 °C
Height After 10 Years:
150-175cm
Scent:
Not Scented
Interesting Foliage:
Yes

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(H4-5) Large creamy white flowers, with deep red blotch at the base. A wonderful big leaved foliage plant from Exbury. Matt green leaves with pink-brown indumentum underneath. Height 150-175cm in 10 years. Needs moist sheltered site.

Named for the late Brian Howell, a member of Exbury Gardens Board of Trustees, and owner of the wonderful Lukesland Gardens at Ivybridge, Devon.

Parentage: macabeanum X praestans
Bred by Douggie Betteridge 1984
Named by Edmund de Rothschild, Exbury Gardens, 2002
Awards: RHS FCC 2002

The Basics

Ideal soil

Acidic soil, good organic content, pH 4.5-6.0. Inkarho range of rhododendrons will tolerate soils up to pH7.5

Sun or Shade

Light dappled shade is best for most varieties.

Shelter

Refer to hardiness rating. Give young plants protection.

Site Selection

Avoid close to trees, roots, invasive weeds, walls, hot patios, dry banks and waterlogged soils. Do not use weed matting or stone mulch.

Plant spacing

Use the height shown in 10 years as a guide to the distance between each plant. Allow room for plant to fill out. If planting closer for instant impact, be prepared to move plants after a few years.

Compost

  • 3 litre pot, dig in 10-20 litres of ericaceous compost.
  • 7.5 litre pot, dig in 20-30 litres of ericaceous compost.
  • 70-80cm specimen, dig in 60 litres of ericaceous compost.
  • 100-120cm specimen, dig in 120 litres of ericaceous compost.

Planting depth

Plant high in the ground, with the top of the rootball visible.

Feeding

Slow-release ericaceous feed recommended in March and straight after flowering.

Mulch

Recommended every few years.

Water

The key ingredient! Keep moist all season, especially the critical time at end of June for flower bud initiation. Tap water is better than no water. Heavy dose at least once per week in dry weather.

Drainage

Ensure good drainage in winter, especially with yellow flowering varieties. Avoid waterlogged sites.

Pruning

Rhododendrons and Camellias: Not normally required. Tidy wayward shoots after flowering.

Evergreen azaleas and Bloombux can be clipped into a low hedge.

Magnolias and Acers: Formative pruning when young to shape into a tree or bush.

Deadheading

Remove old flower-heads, particularly on young or weak plants.

For further advice see here

Size Guide

Size guide

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