Rhododendron Sun Fire INKARHO

Rhododendron Sun Fire INKARHO


unavailable Currently Unavailable

Flowering Month:
Flower Colour:
Height After 10 Years:
Not Scented
Interesting Foliage:
To -20 °C
Currently Unavailable
email me when in stock
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

(H6) Red in bud, opening to orange flowers with yellow centres and stamen. Flowering in mid May with a glowing flame-like appearance this is a tough and floriferous plant with a compact habit. Height 150cm in 10 years.

This plant offers a special colour arrangement. The inside of the flower is soft yellow and the outer edge pink-orange. The three upper lobes display interesting deeper golden spots. From a distance the flowers look bright two-tone orange, a colour which is very popular nowadays. The new leaves have a lovely bronze tinge, and are held on a compact growing plant. Growth is quite broad, growing to about 125cm in 10 years. The plant itself is hardy to at least -21C, and the flowers hardy to -15C, so it is a strong plant with good winter hardiness.

  • Recommended for: Stunning flame orange flower.
  • Easy to grow.
  • Ideal position: Most garden situations.
  • Habit: Dense.
  • Group: Hybrid Rhododendron.
  • Parentage: (Rotgold x Amaretto) x dichroanthum
  • Hybridization date: pre 2000 (c. 1996).
  • Bred by: T. Huisman. Origin: Dutch.
  • Ideal soil: pH 4.5 to 6, and up to pH 7.5 with the Inkarho rootstock
  • RHS Hardiness Rating: H6.
  • How we usually propagate this plant: Graft.

Customer Reviews

By on
" Arrived on time in good condition and looks very healthy, many thanks. "
Star Rating 5
By on
Star Rating 5
By on
"lovely plant full of buds and very healthy"
Star Rating 5
By on
"This has to be one of the most beautiful rhododendrons I have ever seen! And a birthday present from my husband. Delivery was exactly as expected. My plant was securely wrapped. I cannot fault Millais Nurseries (rhododendrons.co.uk) and will definitely buy from them in the future. "
Star Rating 5
By on
"Lovely healthy looking large plant. Supplied in bud it is now about to flower and the colour looks to be spectacular. I chose these plants for their soil tolerance. Would definitely buy again. Very pleased. "
Star Rating 5
By on
"Good sized plant of strong growth. All Rhododendrons bought from you are doing well, only damage caused is by squirrels!"
Star Rating 5
By on
"Fabulous plant. Bigger than expected. Excellent quality with masses of flower buds for next year. Dispatch and delivery faultless."
Star Rating 5
By on
"First of all the delivery was very soon after order was placed. The items were very well packed to avoid damage in transit. I was most impressed by the quality of the plants which appeared supremely healthy and vigorous. They were re-planted within a day and it was obvious that there was extensive, strong root growth. The final proof will be in the spring but at this stage I cannot fault the product in any way. I am very pleased that I placed my faith in Millais Nurseries."
Star Rating 5
By on
"Excellent plant, settled in well & growing happily. Many thanks."
Star Rating 5
By on
"Arrived promptly and in excellent condition. Care instructions were straightforward and easy to follow. The flowers are beautiful and vibrant, drawing the eye to them. Staff were knowledgeable, polite and very efficient - a real pleasure to deal with. Thank you!"
Star Rating 5

Good to know

These are the plants which we have featured in our recent RHS Chelsea Flower Show exhibits, with extensive reporting on the BBC Chelsea TV programme. Interest from new customers around the country has been exceptional, and gardeners have been delighted to learn that they can now grow their favourite plants on most garden soils.

The revolutionary new ‘Inkarho’ lime tolerant rootstock is particularly recommended for growing rhododendrons on neutral clay soils, up to pH7. This patented rootstock was developed from a rhododendron growing in a German lime quarry, and has been the subject of an extensive 20 year breeding and testing programme. They are grown under licence in Germany, and are some of the few plants that we have to buy in. Choice tall hybrids and compact yakushimanum varieties are grafted on the rootstock enabling them to be grown in a much wider range of soil types than ever before. They are hungry plants and require more feeding than other Rhododendrons to keep their foliage a healthy dark green. We recommend our own recipe Millais Nurseries Slow Release Fertilizer and plenty of good Ericaceous compost for best performance. Failures are rare, but occur when there is insufficient soil preparation, and insufficient feed. Without feed, the plants will start to wither and the foliage will go yellow.

The varieties selected are all tough and will flower from a young age. 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. Feed at the rate of a teaspoon of ericaceous slow release fertilizer per plant at the 4 litre size, rising to a tablespoon per plant for a 12 litre plant, and a small handful for a more mature specimen.  For growing in pots, please select the lower growing yakushimanum hybrids, and use good Ericaceous compost 

Please note: Some varieties are wider than their height, especially yakushimanum hybrids. Specimen size plants (eg 80-90cm) will be measured by their largest measurement which could be the spread of the plant.

For further advice, For further advice, see here

Size Guide

Size guide

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

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