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Alta Magnolia

Magnolia grandiflora 'TMGH'

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Alta Magnolia (Magnolia grandiflora 'TMGH') at Snavely's Garden Corner

Alta Magnolia flowers

Alta Magnolia flowers

(Photo courtesy of NetPS Plant Finder)

Alta Magnolia (Magnolia grandiflora 'TMGH') at Snavely's Garden Corner

Alta Magnolia

Alta Magnolia

(Photo courtesy of NetPS Plant Finder)

Height:  30 feet

Spread:  12 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  6a

Other Names:  Southern Magnolia


A beautiful flowering accent tree for home landscapes, smothered in showy and fragrant white cup-shaped flowers in spring; large glossy leaves with brown undersides and a neat columnar habit of growth

Ornamental Features

Alta Magnolia is smothered in stunning fragrant white cup-shaped flowers held atop the branches from mid spring to early summer. It has dark green foliage with brown undersides. The large glossy pointy leaves remain dark green throughout the winter. The fruits are showy red pods displayed from early to late fall.

Landscape Attributes

Alta Magnolia is an evergreen tree with a narrowly upright and columnar growth habit. Its relatively coarse texture can be used to stand it apart from other landscape plants with finer foliage.

This is a relatively low maintenance tree, and should only be pruned after flowering to avoid removing any of the current season's flowers. Deer don't particularly care for this plant and will usually leave it alone in favor of tastier treats. It has no significant negative characteristics.

Alta Magnolia is recommended for the following landscape applications;

  • Accent
  • Shade

Planting & Growing

Alta Magnolia will grow to be about 30 feet tall at maturity, with a spread of 12 feet. It has a low canopy with a typical clearance of 1 foot from the ground, and should not be planted underneath power lines. It grows at a medium rate, and under ideal conditions can be expected to live for 70 years or more.

This tree does best in full sun to partial shade. It requires an evenly moist well-drained soil for optimal growth, but will die in standing water. It is not particular as to soil type, but has a definite preference for acidic soils. It is somewhat tolerant of urban pollution, and will benefit from being planted in a relatively sheltered location. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. This is a selection of a native North American species.

Hardiness Zone Plant Height Minimum Sunlight Soil pH Preference
Accent  Shade 
Flowers  Fruit  Texture 
Ornamental Features

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