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Rhododendron yakushimanum Tina Heinje

Rhododendron yakushimanum Tina Heinje
Yakushima rhododendron

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A hybrid of Rhododendron yakushimanum, this small rhododendron is a bushy plant with evergreen, shiny dark green foliage, offering a very intense early flowering in dark pink tinged with red, visible from afar, creating a strong contrast with the foliage. A hardy variety, to be planted in an ericaceous soil bed or a large container, preferably in partial shade.
Flower size
10 cm
Height at maturity
90 cm
Spread at maturity
90 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -18°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to May, September to October
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Flowering time April to May
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Description

Rhododendron Tina Heinje is a compact habit hybrid that graces us with an early flowering of intense colour. Its intense pink buds open into flowers of a dark pink almost red, with a paler throat speckled with red. Flowers are abundant on a dense and rounded bush, highlighted by small shiny dark green leaves with a lighter fuzzy underside. A particularly striking rhododendron, perfect for dressing up a small shaded area of the garden, in a bed, along a border or in a container.

Rhododendrons are plants of the Ericaceae family, just like heathers, preferring mostly limestone-free soils, with acidic tendencies and humid climates. Rhododendron Tina Heinje stems from the cross-breeding of the varieties yakushimanum Koichiro Wada x Kluis Sensation. It forms a dense bush, with a rounded habit of about 90 cm in all directions at maturity. Its growth is rather slow. Its small, glossy, dark green, elliptical, evergreen leaves cover the plant well. Flowering occurs in April and May. Grouped in corymbs, the light pink-red floral buds open into large funnel-shaped, 10 cm wide, intense pink flowers, almost red, fading in the centre, speckled with red.

Like all yakushimanum hybrids, affectionately nicknamed "rhodos yak" by specialists, Rhododendron Tina Heinje is hardy to -15°C, even -20°C. Although they prefer a semi-shaded exposure, these hybrids tolerate the sun as long as it is not scorching (morning sun) and their base remains moist. Tina Heinje, with its abundant and brightly coloured flowering, will easily dress up a slightly shaded small area of the garden, alongside Ferns, blue or variegated hostas, Pieris, Azaleas, Japanese Maples, or other rhododendrons of the same group to create superb patchworks of textures and colours in spring. Container cultivation requires regular watering with non-limestone water and specific fertiliser inputs for acid-loving plants.

 

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Rhododendron: planting, growing and care
Family sheet
by Virginie T. 15 min.
Rhododendron: planting, growing and care
Read article

Plant habit

Height at maturity 90 cm
Spread at maturity 90 cm
Habit irregular, bushy
Growth rate slow

Flowering

Flower colour pink
Flowering time April to May
Inflorescence Corymb
Flower size 10 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour dark green
Foliage description Elliptical leaves with sharp apexes, 5-6 cm long, with a slightly fuzzy lighter underside, of a leathery texture, evergreen.
Product reference • 19138

Planting and care

Plant Rhododendron Tina Heinje in a semi-shaded location, protected from cold and drying winds, in moist, humus-rich, light soil, with a tendency towards acidity (pH between 4.5 and 6). Like all acid-loving plants, it does not tolerate chalky soils, drought, heatwaves, or heavy soils saturated with water in winter. If the soil remains moist in summer, this rhododendron will also tolerate exposure to non-scorching sun.

Dig a hole three times larger than the pot volume. Soak the root ball in non-calcareous water and plant the bush at collar level, in a mixture composed of 1/4 peat, leaf compost, gravel or pumice, and loam. Water generously and keep the soil moist in summer. Azaleas and Rhododendrons have a shallow root system so they are sensitive to long dry periods. This is why humus-rich soil and abundant watering during dry periods are recommended. Furthermore, this root system is not very strong, so it is essential to lighten heavy soils with draining materials (gravel, pumice, clay pellets) at planting. Apply a mulch of pine bark at the base of the bush every spring to maintain soil moisture while preserving an acidic pH.

Maintenance involves removing faded flowers in summer and dead branches. Azaleas and Rhododendrons can sometimes be attacked by vine weevils that eat the edges of leaves and rootlets, as well as the famous "rhododendron borer" which does not usually cause severe damage. Effective organic solutions are available today against vine weevils. Yellowing of leaves (chlorosis) in Rhododendrons indicates poor iron assimilation in the soil and can lead to premature plant death. While limestone (from the soil or watering) is often the cause, poorly drained soil or deeply planted root balls can also explain the phenomenon.

Planting period

Best planting time March, October
Recommended planting time February to May, September to October

Intended location

Suitable for Shaded rockery, Woodland edge
Type of use Border, Edge of border, Container
Hardiness Hardy down to -18°C (USDA zone 7a) Show map
Ease of cultivation Amateur
Exposure Sun, Partial shade
Soil pH Acidic
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, Rich and well-drained

Care

Pruning No pruning necessary
Soil moisture Moist soil
Disease resistance Very good
Overwinter Can be left in the ground

Planting & care advice

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