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Alta Southern Magnolia
Alta is a smaller growing Southern Magnolia with an upright columnar form to about 20 to 25 feet or so that lends well for use in smaller landscape spaces where its larger cousins won't fit. Its wonderfully fragrant, large white flowers appear during summer measuring 10 inches in diameter and stand out nicely against the leathery, dark green leaves that have rusty-orange undersides.

Alta Southern Magnolia

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Alta Dwarf Southern Magnolia
Magnolia grandiflora 'TMGH' 'Little Gem' PP11612

USDA Plant Hardiness Zones: 6a-10b   Find Your Zone

Special Attributes

'Alta' is a handsome southern magnolia with a more narrow, columnar and dense growth habit than its cousins. Growing 25 to 30 feet tall and only 8-10 feet wide at maturity makes Alta a fine selection for privacy screen plantings or to frame tall homes where space is limited. For two months or more during summer, wonderfully fragrant large white flowers measuring 10 inches across fill the air with a fresh, lemony aroma. Its dark green leaves with orange-bronze undersides are narrower than the species providing unique and outstanding texture in the landscape. 

Note:  It's difficult, if not impossible, to provide information that relates to the mature size of the Alta Magnolia as no one anywhere seems to have a full-grown specimen. Here's what we do know: a height of 20 feet and width of 8 feet or so in 10 years can be expected.

Landscape & Garden Uses

Growing in an upright columnar form 20 to 30 feet tall and 6-8 feet wide, The Alta Southern Magnolia has many uses in the landscape. It is ideal for use as a focal point specimen, in groupings, or as an evergreen privacy screen planting or background. Also effective to frame the corners of tall homes or other buildings or as espalier; trained to grow against a wall. Can also be grown in containers though eventually might need to be transplanted to the landscape. A fine addition to fragrance gardens, wildlife gardens, cut flower gardens, and cottage gardens. 

Spacing:  7-8' for solid screens;  18 feet or more for space between trees

Cultural Preferences

Alta Southern Magnolia is very easy to grow in most an average moist but well-drained soil, preferring one that is rich in organic matter. It grows well in full sun or part shade. We suggest 4 hours or more of direct sunlight or all-day filtered sun.

Helpful Articles

Click on a link below to find helpful advice from our experts on how to plant, prune, feed and water Southern Magnolia trees.

Plant Details 

USDA Plant Hardiness Zones: 6a-10b   Find Your Zone
Plant Type:  Evergreen Flowering Tree
Height at Maturity:  20-30'
Width at Maturity: 6-8'
Spacing:  6' for solid hedge;  16' for space between between trees
Growth Habit / Form:  Columnar to Pyramidal, Dense, Upright
Flower Color:  White
Flower Size:  Large, 10"
Flowering Period:  Summer
Flower Type:  Single
Fragrant Flowers:  Yes - extremely fragrant!
Foliage Color:  Dark Green, Copper-orange undersides
Fragrant Foliage:  No
Attracts:  Visual Attention
Resistances:  Deer, Disease, Drought, Heat, Humidity, Insect
Sun Needs:  Full Sun or Mostly Sun, Morning Sun with Dappled or Afternoon Shade, All Day Filtered Sun, Morning Shade with Evening Sun
Water Needs:  Average, Low when established
Soil Type:  Clay (amended), Loam, Sand (amended), Silt 
Soil Moisture / Drainage:  Well Drained Moist
Soil pH:  4.5 - 7.5 (Acid to Slightly Alkaline)
Maintenance / Care:  Low

Plant Long & Prosper!

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