Rhododendron yakushimanum Koichiro Wada STANDARD

Rhododendron yakushimanum Koichiro Wada STANDARD

Item: DYAK

in stock In stock

Flowering Month:
May
Flower Colour:
Pinky/White
Hardiness:
To -20 °C
Height After 10 Years:
25-50cm
Scent:
Not Scented
Interesting Foliage:
Yes
Choose Size:
£95.00

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(H6)  Pink in bud opening to delightful white bell shaped flowers in May that have the appearance of apple blossom. A really choice plant, R. yakushimanum Koichiro Wada has silvery new growth which turns dark glossy green, with dense brown indumentum underneath the leaf. There is a distinctive white covering (tomentum) on the top of the leaves. 

This choice variety has been grafted onto a straight stem at about 50-60cm above ground soil level to form a Standard. It has a neat head measuring 30-40cm wide now, which will grow to around 40-60cm in 10 years. Requires moist acid soil and permanent staking.

This is generally accepted to be the best form of yakushimanum, selected from seedlings raised at Exbury Gardens. This is the FCC form (awarded in 1947) and was imported by L. de Rothschild in 1934 from K. Wada in Japan. It normally requires specialist grafting to propagate, but then is an easy grower, and performs so much better than seedling raised plants often offered for sale elsewhere. It is the parent of many excellent low-growing yakushimanum hybrids, but few compare to the quality of this original parent. We love this plant for it's pretty flower and exceptional foliage.

 

    • Ideal for containers and small gardens.
    • Easy to grow.
    • Ideal position: Dappled shade.
    • Habit: Compact bushy.
    • Group: Rhododendron.
    • Subsection: Pontica.
    • Introduction date: pre 1950 (1934).
    • Species distribution: Yakushima Island, Japan.
    • Approximate altitude: 1,200-1,800m
    • Ideal soil: pH 4.5 to 6.
    • RHS Hardiness Rating: H7.
    • How we usually propagate this plant: Graft.
    • Awards: RHS Award of Garden Merit.

Good to know

Standard Rhododendrons (grown on a stem) were popular during the first half of the twentieth century, and are now finding renewed interest. We grow a limited range of rhododendrons and azaleas as standards, grown on a single straight stem of various heights. These are ideal for patio pots or formal situations (and better looking than a Bay tree!).

Please note: Standards require a good stake throughout their life to prevent wind damage. Taller standards are suitable for growing in the ground, but only short standards should be grown in pots, so that they are not blown over in high winds. If growing in containers, repot into a slightly larger pot every 3 years, using a good ericaceous compost.


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.

Shelter

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.

Compost

  • 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.

Feeding

Slow-release ericaceous feed recommended in March and straight after flowering.

Mulch

Recommended every few years.

Water

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.

Drainage

Ensure good drainage in winter, especially with yellow varieties. Avoid waterlogged sites.

Pruning

Not normally required. Tidy wayward shoots after flowering. Evergreen azaleas and Bloombux can be clipped into a low hedge.

Deadheading

Remove old flower-heads, particularly on young or weak plants.


For further advice see here

Size Guide

Size guide

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