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Magnolia grandiflora Alta Tmgh

Magnolia grandiflora Alta 'Tmgh'
Summer Magnolia, Large-flowered Magnolia, Bull bay Magnolia, Evergreen Magnolia

4,4/5
2 reviews
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Very beautiful young plant, received in very good condition.

Corinne, 05/12/2023

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This plant carries a 24 months recovery warranty

More information

An evergreen magnolia, with dark and glossy foliage, unique in its naturally narrow and conical habit, it is suitable for small gardens. Unlike the species, the tree produces beautiful flowers resembling large white tulips, with a delightful lemony fragrance, from June to August, starting at the age of 5-6 years. Provide it with sunlight and a deep, moist soil, preferably neutral to slightly acidic.
Flower size
20 cm
Height at maturity
6.50 m
Spread at maturity
1.50 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -15°C
Soil moisture
Moist soil
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Best planting time April to May
Recommended planting time March to June
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Flowering time June to September
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Description

Magnolia grandiflora 'Alta' is a highly desirable selection of a majestic evergreen tree. With a particularly narrow and conical habit, it creates a dark and glossy fir-like silhouette in the garden, adorned with abundant evergreen foliage throughout the year. Unlike the species, it flowers well before its tenth anniversary. The spectacle takes place in summer, lasting almost three months, with magnificent flowers resembling large white tulips with a deliciously lemony fragrance. 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

Native to the Southeastern United States, Magnolia grandiflora thrives in bright light, heat, humidity, and rich, deep soil. Its range extends from Texas to Virginia, including the northern and central parts of Florida. 'Alta' is a recent cultivar selected for its narrower and more compact habit, as well as its rapid flowering. At maturity, this small tree reaches a height of about 7 m (23 ft) with a spread of 1.5 to 2 m (5 to 7 ft). Its growth is relatively slow, although it quickly forms a trunk from which upright branches emerge, creating a natural looking tree with a narrow pyramid shape. The flowering mainly occurs in summer, from June to August-September (in the southeastern USA, flowering begins in late April and ends in July). The large solitary flowers, 15 to 25 cm (6 to 10 in) in diameter and resembling tulips, consist of thick, pure white petals surrounding a cone covered with yellow stamens. Each flower only lasts for a day on the tree, but they continuously renew themselves. This flowering is followed by the formation of large reddish cones that are quite decorative, revealing red seeds. The evergreen leaves are alternate, simple, leathery, and 15-20 cm (6-8 in) long. They are dark and glossy on the upper surface, with a matte bronze underside.

 

Magnolia grandiflora 'Alta' is mainly used as a specimen tree in small gardens, but it can also be used as an avenue tree along larger properties or in a free hedge. Choose a strategic location in the garden to admire this tree, perhaps the most beautiful of all evergreens, and enjoy its lemon-scented flowering. It could be paired, for example, with another large magnolia, but one that is deciduous and blooms in spring, such as the Magnolia soulangeana.

Magnolia grandiflora Alta Tmgh in pictures

Magnolia grandiflora Alta Tmgh (Flowering) Flowering
Magnolia grandiflora Alta Tmgh (Foliage) Foliage

Plant habit

Height at maturity 6.50 m
Spread at maturity 1.50 m
Habit fastigiate, upright
Growth rate slow

Flowering

Flower colour white
Flowering time June to September
Inflorescence Solitary
Flower size 20 cm
Fragrance Very fragrant, lemon-scented.
Fruit colour red

Foliage

Foliage persistence Evergreen
Foliage colour dark green

Botanical data

Genus

Magnolia

Species

grandiflora

Cultivar

Alta 'Tmgh'

Family

Magnoliaceae

Other common names

Summer Magnolia, Large-flowered Magnolia, Bull bay Magnolia, Evergreen Magnolia

Origin

Cultivar or hybrid

Product reference841611

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Planting and care

The Magnolia grandiflora 'Alta' should be planted in spring in deep, rich, moist, even damp soil, in a good forest soil (pH around 6). Pure ericaceous compost is not recommended, as it is too nutrient poor. It appreciates a sunny and open position, sheltered from prevailing winds. Be careful not to break the fleshy roots and not to bury the root ball too deeply. Mulch and water in summer. Beware of severe frosts and hot, dry summers. Maintain good humidity by showering its foliage with a fine spray only in the evening. Pruning is unnecessary.

1
7,50 € Bag

Planting period

Best planting time April to May
Recommended planting time March to June

Intended location

Suitable for Meadow
Type of use Free-standing
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Neutral, Any
Soil type Clayey (heavy), Silty-loamy (rich and light)
Soil moisture Moist soil, Deep, rich, well-drained

Care

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