Rhododendron Peter Alan

Rhododendron Peter Alan


in stock In stock

Flowering Month:
Flower Colour:
To -20 °C
Height After 10 Years:
Not Scented
Interesting Foliage:
7.5 litre
Available stock: 16
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(H6)  Purple blue flowers with a prominent purplish black eye, and contrasting anthers, forming a good upright truss during late May. A strong growing plant with a broad upright habit and heavily textured dark green foliage. Height 150-175cm in 10 years. 

A Purple Splendour hybrid raised by Peter Girard, USA

  • Recommended for: Tough variety with striking flowers. Hedging and Screening.
  • Ideal position: Dappled shade in most garden situations.
  • Habit: Upright, Bushy.
  • Group: Hardy Hybrid.
  • Parentage: A hybrid including ‘Purple Splendour’ and 'Blue Peter'.
  • Hybridisation date: pre 2000 (1972)
  • Bred by: Girard Nurseries. Origin: USA
  • Ideal soil: pH 4.5 to 6.
  • RHS Hardiness Rating: H6.
  • How we usually propagate this plant: Cutting.
  • Awards: 'Best Blue' award Great Lakes chapter of American Rhododendron Society, 1982.

Customer Reviews

By on
"I picked the plant up from the very efficient 'click and collect' process run by Millais. The plant was totally spectacular. It has transplanted well and doing fine. Love the name of the variety, Peter Alan, as mine is Alan Peter!"
Star Rating 5
By on
"Excellent plant. In full bloom when it arrived. Have already enjoyed it"

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.


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.


  • 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.


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


Recommended every few years.


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.


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


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.


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

For further advice see here

Size Guide

Size guide

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