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Collector's item

Magnolia x acuminata Blue Opal

Magnolia x acuminata Blue Opal ®
Magnolia

5,0/5
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Bush having undergone a reshipment (the one from 08/21 not having survived). Beautiful, well-ramified bush. Immediately rehydrated upon arrival and planted in partial shade as our lovely region is experiencing increasingly intense sunlight. Waiting for it to take root and for the next colourful flowering.

Nathalie, 05/06/2023

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This plant carries a 24 months recovery warranty

More information

Value-for-money
A magnolia with unprecedented flowering in the form of blue buds opening into yellow flowers washed with green, measuring 8-10 cm (3-4 in).Flowering takes place in May-June amongst the foliage, on a large deciduous bush measuring 5-6 meters (16-20 feet), with a conical and wide habit. While all flowering magnolias are unforgettable, this variety is truly exceptional. Suitable for any soil that is not excessively chalky, in full sun or partial shade.
Flower size
8 cm
Height at maturity
6 m
Spread at maturity
4 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -20°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time March to May, September to November
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Flowering time May to June
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Description

The Magnolia Blue Opal is the first hybrid with blue flower buds, more precisely a bluish cerulean with a touch of gray. They open to yellow flowers with green reflections, albeit small in size, but offering a unique and refined color palette. Each flower is a beautiful surprise, standing like a small candle on young, tender green foliage. The flowering of this large bush with a broadly conical habit takes place in May-June. While all flowering magnolias are unforgettable, this variety is truly exceptional. Provide it with moist soil without excessive limestone and a sunny to partially shady exposure.

 

This Blue Flowered Magnolia, belonging to the magnolia family, is a recent American creation resulting from the cross-breeding between the vigorous Magnolia acuminata, a North American tree with yellow flowers, and the M. denudata, a Chinese tree with white flowers. A branched tree with an upright form, taller than it is wide, it reaches a height of about 6 meters (20 feet) at maturity, with a width of 3-4 meters (10-13 feet). Its growth is fairly rapid. Often presenting an open habit, it grows on a single trunk. Its deciduous foliage consists of obovate, dark green leaves, paler on the underside and finely hairy, turning yellow-brown in autumn, measuring 15 to 20 cm (6 to 8 in) in length. In May-June, solitary and erect flowers, measuring 8 to 10 cm (3 to 4in) in height, appear at the end of the branches, after the leaves have emerged. These fragrant flowers are formed by wide blue petals that turn bright yellow with a green wash as the flower opens. These flowers bloom from buds protected by silky bracts. It should be noted that this magnolia is relatively tolerant of limestone in the soil, although not in excess.

 

This Magnolia Blue Opal is not only an ornamental tree, but also a botanical curiosity that will be a pleasure to introduce to passing friends. It will make an impression in a small-sized garden and catch the attention of curious observers in a large park. It is most often used as a solitary specimen in the middle of a short grass meadow, where its unique spring flowering is most effective. But once the flowering is over, the small tree becomes inconspicuous. To take its place, also consider other small trees such as the Summer Tamarisk, the Wedding Cake Tree, or shrubs like mock oranges, lilacs, beautybush, botanical roses, and many more. The Daphne Magnolia can also be associated with a mass planting of acid-loving shrubs (Rhododendrons, Camellias, Hydrangeas, Pieris, Daphne, Witch-hazels...), for a Japanese-style garden. It is also possible to create beautiful flowering hedges along pathways, alternating this Magnolia with other cultivars (Magnolia grandiflora, stellata, Magnolia denudata...). Its root system is not a danger to foundations, so it can be planted against a house wall.

  

Anecdote:
Magnolias are ancient trees, with fossils dating back more than 20 million years. Their magnificent flowering is considered one of the most primitive: their flowers are, from an evolutionary point of view, similar to the earliest existing flowers.
The bark of magnolias has medicinal properties and is used in cosmetics.
Their wood is considered precious.


Historical:
It was named Magnolia in 1703 by Charles Plumier, botanist to King Louis XIV, paying homage to the physician-botanist Pierre Magnol (1638-1715), who was one of the directors of the Botanical Garden of Montpellier in the late 17th century. Its specific name, soulangeana, originates from Etienne Soulange-Bodin (1774-1846), a retired cavalry officer from Napoleon's army who dedicated himself to horticulture. In his château de Fromont, near Paris, he became passionate about magnolias and obtained this hybrid in 1829, the origin of a magnificent lineage of cultivars today!

Magnolia x acuminata Blue Opal in pictures

Magnolia x acuminata Blue Opal (Flowering) Flowering

Plant habit

Height at maturity 6 m
Spread at maturity 4 m
Habit spreading
Growth rate normal

Flowering

Flower colour blue
Flowering time May to June
Inflorescence Solitary
Flower size 8 cm
Fragrance slightly scented, sweet and floral
Fruit colour red

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Botanical data

Genus

Magnolia

Species

x acuminata

Cultivar

Blue Opal ®

Family

Magnoliaceae

Other common names

Magnolia

Origin

Cultivar or hybrid

Other Magnolia

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Planting and care

The Magnolia 'Blue Opal' prefers sheltered positions, sunny to semi-shaded exposures, a moist, well-drained, rich, even slightly chalky, neutral or acidic soil. It is not fussy about the soil quality. On the other hand, it does not like overly dry soils, windy locations, or root competition, as its root system is shallow. Despite good hardiness, it is preferable to protect young subjects from severe frost in the first years following planting. Note that late frosts and cold winds can damage flower buds and young leaves and thus harm flowering. Planting of the Magnolia can be done in spring or autumn, outside the freezing period, ensuring it is sheltered from cold winds. Dig a hole 80 cm (32in) on each side and equally deep, with a good supply of ericaceous compost. Take care to gently handle it when planting it in the hole, so as not to break the fleshy but fragile roots. Immediate watering, with lime-free water (rainwater), allows the soil to be settled around the roots. During the first year of planting, the Magnolia requires one watering can per week. It will appreciate a good mulch once a year in spring. It is recommended to mulch around its base, to retain moisture during the hot season, enrich the soil, and protect it from the cold in winter. As its roots are fragile, it is best to avoid transplanting it once established. The only enemies of the Magnolia are pests such as scale insects, snails, and slugs that sometimes attack young plants significantly, as well as diseases such as root rot (in overly waterlogged soil), coral disease, and Pestalozzia. Note that magnolias are ornamental trees that tolerate air pollution well.

Planting period

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

Intended location

Suitable for Meadow, Woodland edge
Type of use Border, Free-standing
Hardiness Hardy down to -20°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, Well-drained, humus-rich, light and fertile.

Care

Pruning instructions Pruning, if necessary, should be done in summer after flowering.
Pruning Pruning recommended once a year
Pruning time July
Soil moisture Moist soil
Disease resistance Very good
Overwinter Can be left in the ground
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