Rhododendron XXL

Rhododendron XXL

unavailable Currently Unavailable

Flowering Month:
Flower Colour:
To -15 °C
Height After 10 Years:
Not Scented
Interesting Foliage:
Currently Unavailable
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7.5 litre
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(H5) Red in bud, opening to extra large white flowers with vivid carmine pink frilled edging during May. A truly striking and long lasting flower on a dense and strong growing plant with an upright habit. The leaves, shoots, and prominent flower buds all have an obvious quality to them, and the flowers are of strong substance and therefore last about a week longer than most varieties. Height 150-175cm in 10 years. Requires moist acid soil.

Also known as 'Hort02'. It has Plant Breeders Rights, propagation for sale is illegal. 

  • Recommended for: Hedging and screening and stunning flower.
  • Easy to grow.
  • Ideal position: Dappled shade in most garden situations.
  • Habit: Dense.
  • Group: Hybrid Rhododendron.
  • Parentage: Not declared.
  • Hybridization date: 2013
  • Bred by: Hortibreed, Belgium, after 10 years of intensive breeding.
  • Ideal soil: pH 4.5 to 6.
  • RHS Hardiness Rating: H6.
  • How is this plant propagated: micropropagation under licence.

Customer Reviews

By on
"This is the most beautiful rhododendron! Even though it was only about 50cm tall, it arrived looking very strong, with lots of large buds. Within 2 weeks it was in full bloom showing off huge bunches of beautiful flowers. I especially like the two-coloured flower with pink inside and bright pink frills. Surpassed my expectations, absolute delight!"
Star Rating 5
By on
"This rhododendron arrived promptly, and was in excellent condition when delivered. It is a fine specimen, I look forward to it flowering in the spring"
Star Rating 5
By on
"I am delighted with my rhodo XXL. Big healthy plant with lots of buds,and it arrived quickly well wrapped and in excellent condition.This is my second one. I shall continue to buy from this reliable company"
Star Rating 5
By on
"Plant in good condition and looks healthy, can't wait to see its flower next year."
Star Rating 5
By on
"Very quick delivery and well packaged. Plant in excellent condition and looks healthy. Foliage nice and dark with new growth despite recent hot, dry weather. Will be purchasing more in the near future."
Star Rating 5
By on
"I was very impressed by the quality of the two beautiful rhododendrons that arrived, also with the service and speed with which the plants were delivered, altogether a very pleasant experience. "
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

Delivery & Returns

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