Rhododendron galactinum 'Galacticus'

Rhododendron galactinum 'Galacticus'


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Flowering Month:
Flower Colour:
To -20 °C
Height After 10 Years:
Not Scented
Interesting Foliage:
Currently Unavailable
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3 litre
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5 litre
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(H6 FALCONERA) Pink in bud, opening to white flowers with a prominent dark crimson blotch in the throat. The rounded flower trusses are composed of 9 to 15 campanulate flowers each with 7 lobes, in April-May. This plant has matt green oblong leaves up to 210mm long and attractive dense cinnamon indumentum on the undersides. It is distinctive with its brown wooly tomentose young growth buds. The plant has rough grey-brown bark on its stems and grows with an upright habit, reaching a height of 150-175 cm in 10 years, eventually growing up to 8m tall.

Epithet: Milky.

This is a really good flowering form of R. galactinum selected by Ted Millais and growing at Crosswater Farm. It was much admired by species expert and author John McQuire who rated it highly. 

  • Recommended for cold gardens where other big leaved species may not grow.
  • Plantsman range.
  • Ideal position: sheltered woodland, will not tolerate heat or sudden drops in temperature.
  • Habit: upright, tree-like.
  • Group: Species Rhododendron.
  • Subsection: Falconera.
  • Introduction date: pre 1950 (1910).
  • Species distribution: Central & W Sichuan.
  • Approximate altitude: 2,300 to 3,300m.
  • Ideal soil: pH 4.5 to 6.5.
  • RHS Hardiness Rating: H5.
  • How we usually propagate this plant: Cutting.

Customer Reviews

By on
"Terrific condition"
Star Rating 5

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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