Millais Nurseries
Rhododendron ambiguum 'Jane Banks'
Item: SAMBJB
Currently Unavailable
April-May
Yellow
100-125cm
Not Scented
No
To -15 °C
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Clear primrose yellow flowers with greenish spots on the upper lobes in April - May. It is a tough, close growing shrub with a bushy upright habit and attractive small glossy leaves with glaucous scaly underside. A delightful plant that can be pruned hard after flowering. Height 100-120cm in 10 years.
R. ambiguum Jane Banks is a good clone raised at Hergest Croft Gardens in Herefordshire, which was selected by Dick Banks and named after his late wife in 1976.
- Recommended for lovely yellow flower.
- Easy to grow.
- Ideal position: most garden situations but does need good drainage.
- Habit: compact and upright.
- Group: Small Leaved Rhododendron.
- Subsection: Triflora.
- Introduction date: pre 2000 (1970s)
- Species distribution: Sichuan.
- Approximate altitude: 2,300-4,500m
- Ideal soil: pH 4.5 to 6.
- RHS Hardiness Rating: H5.
- How we usually propagate this plant: Cuttings.
Customer Reviews
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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