Rhododendron Saint Tudy
Rhododendron Saint Tudy
Rhododendron x augustinii 'Saint Tudy'
Hybrid Rhododendron
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Description
Rhododendron 'Saint Tudy' is a compact hybrid suitable for acidic soil borders in light shade. Its small flowers of a 'lobelia' blue form tight umbels on evergreen, dark and aromatic foliage. This small shrub, with a beautiful blue flowering in early spring, makes a striking effect in the garden or in a large pot on a sheltered terrace.
This rhododendron belongs to the Ericaceae family. It is a hybrid between R. impeditum, a dwarf species from the mountains of Sichuan and Yunnan, and R. augustinii, a Chinese shrub from western Hubei to Sichuan and Tibet, renowned for its flowers in lavender-blue tones.
The cultivar 'Saint-Tudy' was obtained in Cornwall, at the Lamellen estate located in the village of St Tudy, by E. J. P. Magor in 1936. It is part of a small series of English selections named after local parishes ('St Breward', 'St Merryn', 'St Minver').
Its habit is naturally compact, rather upright when the plant is young, then forming a dense cushion with age. Its growth is slow. At 10 years old, the shrub measures about 1m tall with a 0.80 m spread; in open ground, a mature specimen will reach up to 1.50 m in all directions, depending on growing conditions.
Flowering occurs from April to May in the form of small, dense, globular clusters composed of modestly sized, five-lobed campanulate flowers. Their colour is a mauve-blue with a lighter centre, sometimes washed with white; the corollas are lightly fragrant.
The foliage is evergreen in winter. It consists of small, ovate to lanceolate, leathery, dark green leaves. When crushed, the leaves emit a slight aromatic scent. The young leaves are bronze-tinted, and their undersides feature characteristic fine scales. The root system is fibrous and shallow. It requires acid, well-aerated, light soils. This variety is not hardy below -12°C.
Plant Rhododendron 'Saint Tudy' at the edge of a damp woodland or in the foreground of an acidic soil bed. In a container of at least 40–50 cm in diameter, it will thrive on an east- or north-facing terrace. You can associate it with Japanese azaleas, Daphne 'Perfume Princess' for its fragrance, or with other dwarf rhododendrons such as 'Moerheim', 'Blue Tit' and 'Dream Land'. A carpet of low, evergreen ferns such as Polypodium vulgare will keep their base cool without excessive root competition.
Plant habit
Flowering
Foliage
Botanical data
Rhododendron
x augustinii
'Saint Tudy'
Ericaceae
Hybrid Rhododendron
Rhododendron 'Saint-Tudy', Rhododendron 'St Tudy'
Cultivar or hybrid
Planting and care
Plant Rhododendron 'Saint Tudy' in a semi-shaded position, protected from cold, drying winds, in a moist, humus-rich, light, acidic soil. Like all ericaceous plants, it does not tolerate limy soils, nor heavy, waterlogged soils in winter. Dig a hole three times the volume of the pot. Soak the root ball in (non-calcareous) water and plant the shrub at the level of the collar, in a mixture composed of 1/4 peat, leaf mould, gravel or pozzolana, and loam. Water generously and keep the soil moist in summer.
Azaleas and Rhododendrons have a shallow root system. Consequently, they are susceptible to long dry periods. Therefore, a soil enriched with humus and abundant watering during dry spells are recommended. Moreover, this root system is not very strong, which is why it is essential to lighten heavy soils with drainage materials (gravel, pozzolana, clay balls) at planting time.
Then, apply a mulch of shredded pine bark at the base of the shrub every spring to keep the soil moist while maintaining an acidic pH. Maintenance simply involves deadheading the spent flowers in summer and removing dead branches.
Azaleas and Rhododendrons can sometimes be attacked by vine weevils, which eat the edges of leaves and the rootlets, as well as by the well-known 'rhododendron lace bug', which does not often cause significant damage. Yellowing of the leaves (chlorosis) in Rhododendron indicates poor iron assimilation in the soil and causes premature death of the plant. Though lime is often the cause, poorly drained soil or a deeply planted root ball can also explain the phenomenon.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
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The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:
- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.