Millais Nurseries
Rhododendron yunnanense Red blotch AGM
Item: SYUNNRED
Currently Unavailable
May
Light Pink , White & Cream
150-175cm
Not Scented
No
To -15 °C
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A lovely selection that we have made, with slightly larger bright lavender pink flowers, which fade paler in May, and with a prominent red blotch in the throat. Benefits from pruning and some protection when young. In cold winters and exposed positions, R. yunnanense can become deciduous. Reasonably tolerant of drier and shadier conditions. Height 150-175cm in 10 years.
A large showy plant which is the National flower of Yunnan.
- Recommended for its free flowering, showy habit.
- Easy to grow.
- Ideal position: most garden situations.
- Habit: upright.
- Group: Small Leaved Rhododendron.
- Subsection: Triflora.
- Introduction date: pre 1900 (1889).
- Species distribution: SW Sichuan, W Yunnan, Upper Burma.
- Approximate altitude: 3,350-3,9500m
- Ideal soil: pH 4.5 to 6.0
- RHS Hardiness Rating: H5.
- How we usually propagate this plant: Cutting.
- Awards: RHS Award of Garden Merit.
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.
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 flowering varieties. Avoid waterlogged sites.
Pruning
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.
Deadheading
Remove old flower-heads, particularly on young or weak plants.
For further advice see here
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