Evergreen Azalea Johanna  AGM

Evergreen Azalea Johanna AGM

Item: AJOH

in stock In stock

Flowering Month:
Flower Colour:
To -20 °C
Height After 10 Years:
Not Scented
Interesting Foliage:
Currently Unavailable
email me when in stock
2 litre
3 litre
Available stock: 1
Currently Unavailable
email me when in stock
7.5 litre
Currently Unavailable
email me when in stock
15 litre
Collect in Store

This item is available for collection.

Home Delivery

UK mainland delivery from £8.95

Superb large carmine red flowers in May. This plant is one of the best azaleas for autumn foliage, with dark shiny leaves turning dark red in winter. We love it because it looks good all year. Highly recommended! Height 75-90cm in 10 years.

  • Ideal for containers and small gardens and fabulous foliage.
  • Easy to grow.
  • Group: kaempferi (hybrid).
  • Parentage: 'Florida' (s) X seedling
  • Hybridization date: pre 2000 (1966).
  • Bred by: Vuyk van Ness. Origin: Dutch.
  • 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.
  • Awards: RHS Award of Garden Merit.

Customer Reviews

By on
"Very good quality healthy plants "
Star Rating 5
By on
"Good quality plant, reasonable cost "
Star Rating 5
By on
"Excellent plants, delivery a bit expensive but wait and order all plants together keeps the cost down. Extremely well packed, will buy again."
Star Rating 5
By on
"The Azalea I ordered was delivery very promptly, very healthy plant and much bigger than I expected. I will have no hesitation in recommending family and friends to purchase their gardening plants from this nursery. I have only ever had to contact them once and they were very professional, friendly and very efficient in answering my question."
Star Rating 5
By on
"I purchased 3 Johanna, they were delivered in excellent condition,all were planted out and are extremely healthy. Many thanks."
Star Rating 5
By on
"As my previous review brilliant "
Star Rating 5
By on
"An excellent plant, well packaged and efficiently dispatched"
By on
"Excellent plants, delivered in excellent condition, since planting they have grown on very well, I will definitely buy from you again."
Star Rating 5
By on
"Delighted with plants, packaging and prompt delivery. Our first purchase from you nursery, will recommend."
Star Rating 5
By on
"Superb quality shrub - no complaints"
Star Rating 5
By on
"Plants arrived in good condition and so far looking very healthy. Flower buds developing well. "
Star Rating 5
By on
"Item delivered very quickly and was well packaged. The shrub itself was of a good quality."
Star Rating 5
By on
"very happy with product and delivery"

Good to know

From a botanical point of view, evergreen azaleas are part of the rhododendron family, but typically they only have 5-7 stamens in the flowers instead of 11-13 stamens present in other rhododendrons. Evergreen azaleas, sometimes known as Japanese azaleas, are as popular as ever, and are ideal for any size of garden from a window box to a large estate. Most azaleas grow to 60-75 cm in 10 years, but look out for our speciality nakaharae azaleas which are late flowering, prostrate, and excellent for cascading over walls or tubs.

Some of the first evergreen azaleas were introduced by Ernest Wilson (Wilson’s 50) from Japan at the beginning of the twentieth century. These small flowered varieties are full of character, best seen at the Isabella Plantation in Richmond Park where they look delightful. However, these early plants are not as hardy as modern varieties such as those bred in Northern Germany. Other breeders, particularly in America, have concentrated on breeding larger flowers which can certainly look impressive. Our range should not be compared to the R. indica types which are sold as houseplants and are not fully hardy outside.

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, or approximately 3 plants per m². 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.  Evergreen azaleas are suitable for growing in pots and containers; re-pot every 3 years for best performance.

Please note:Rabbits and deer like the soft new growth of evergreen azaleas, so netting protection may be necessary some years.


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

Our website calculates the delivery charge according to weight and delivery location throughout the UK. To see these charges, please enter your postcode at the checkout, and you will see the charge vary as you add more items to your wheelbarrow.

Please see here for delivery information

Please see here for cancellation and return information