Azaleodendron Gowenianum

Azaleodendron Gowenianum


in stock In stock

Flowering Month:
Flower Colour:
Purple & Blue
Height After 10 Years:
Interesting Foliage:
To -20 °C
3 litre
Available stock: 2
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This rare hybrid between a rhododendron and a deciduous azalea dates from before 1825. Strongly scented light purple star shaped flowers appear in early June. The leaves are usually evergreen during most winters. Height 120cm in 10 years.

  • Recommended for pretty scented flowers.
  • Easy to grow.
  • Group: Azaleodendron.
  • Parentage: periclymenoides or viscosum (s) X catawbiense x ponticum.
  • Hybridization date: pre 1900 (1825).
  • Bred by: J.R. Gowen. Origin: British.
  • Habit: upright.
  • Ideal position: Most garden situations.
  • Ideal soil: pH 4.5 to 6.
  • RHS Hardiness Rating: H6.
  • How we usually propagate this plant: Cutting.


Customer Reviews

By on
"A good sized, healthy, well-shaped plant arrived which I shall look forward to flowering. This azalea/rhodo cross is a lovely shrub with a beautiful scent. I had a similar one years ago so am looking forward to this getting established."
Star Rating 5
By on
"Arrived in perfect condition in 2 days"
Star Rating 5
By on
"I first bought this plant from Millais about 5 years ago, and it is now an impressive 4 foot square with an excellent form. A plant that I have found impossible to research in any of my rhododendron plant books, perhaps due to its scarcity. After seeing it being offered again by Millais I didn't hesitate to buy another as it has lovely flowers, scent and is rare.. The new plant arrived in excellent order and was very bushy for a 3 litre pot. Well pleased!"
Star Rating 5
By on
"After some excellent advice we received some fantastic quality plants shipped to the Outer Hebrides really quickly and in very good condition"
Star Rating 5
By on
"Fabulous plant exactly as described"
Star Rating 5
By on
"Plant received in excellent condition and looking very healthy. Looking forward to initial flowers this year and a full blossom next with all the scent that we know this variety can give."
Star Rating 5
By on
"Lovely plant. Plenty of buds"
Star Rating 5
By on
"Plants arrived safely packaged, on time and they were healthy and a good size. Instructions on after care and planting were also included"
Star Rating 5

Good to know

Azaleodendrons are a group of hybrids between deciduous azaleas and evergreen rhododendrons. They are rarely offered elsewhere, but are generally fully hardy semi-evergreen shrubs which flower in late spring and early summer, sometimes delightfully scented. Azaleodendrons are quite variable, with some looking fairly compact in habit and like an evergreen azalea, and others more upright in habit and nearly bare in winter, like a deciduous azalea.

All require good moist ericaceous soil with a high organic content. For a guide to plant spacing, use the height we give in 10 years as a guide to the distance between each plant. Plant no deeper than the top of the rootball, and dig in plenty of good ericaceous compost around the sides. A teaspoon of slow release feed is sufficient for a 3 litre plant, rising to a small handful for a mature plant.

For further advice, For further advice, see here

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

Delivery & Returns

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