Alta™ Southern Magnolia
Magnolia grandiflora 'TMGH'
Description | A columnar form that remains upright and tight year after year without pruning. Lustrous dark green leaves have rusty undersides. White, cup-shaped fragrant flowers. Valuable for smaller spaces in urban and suburban landscapes. Evergreen. |
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Light | Full sun |
Watering | Once established, water deeply when dry. |
Blooms | Summer |
Mature Size | Very slow growing to 20 ft. tall, 9 ft. wide in 10 years. |
Deciduous/Evergreen | Evergreen |
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Special Features | Easy Care, North American Native Selection, Waterwise, Compact Form |
Growth Rate | Slow |
Growth Habit | Columnar |
Flower Attributes | Flowers for Cutting, Fragrant, Showy Flowers |
Patent Act | Asexual reproduction of plants protected by the Plant Patent Act is prohibited during the life of the patent. |
Design Ideas | Such a tall narrow evergreen is perfect for gaps between multistory homes and buildings. Stands beautifully against tall walls with no windows to fill in space and reduce glare on institutional structures.. Makes a potential windrow along property lines or try as a pair to flank a vehicular entry. Makes interesting contrast in both form and texture against needled evergreens and trees with seasonal spring and fall color. |
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Flower Color | White |
Foliage Color | Green |
Companion Plants | This beautiful plant works well with Marge Miller Camellia, (Camellia sasanqua 'Marge Miller'), Golden Flare Azalea, (Azalea x 'Golden Flare'), Lady in Red Hydrangea, (Hydrangea macrophylla 'Lady in Red') and Hellikki Rhododendron, (Rhododendron x 'Hellikki'). It's also traditional with Prairie Blue Eyes Top of the Line Daylily, (Hemerocallis x 'Prairie Blue Eyes') and Ruffled Velvet Siberian Iris, (Iris siberica 'Ruffled Velvet'). |
Care | Follow a regular watering schedule during the first growing season to establish a deep, extensive root system. Watering can be reduced after establishment. Feed with a general purpose fertilizer before new growth begins in spring. |
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Lore | Southern magnolia is the state flower of Louisiana and Mississippi. It grows in mixed stands of forest in areas of well drained but evenly moist soils and accessible water table. It is also considered the largest native flower in North America. |
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This Plant's Growing Zones: 6-10

Your USDA Cold Hardiness Zone:
Your climate may be too cold for this plant
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Buy Locally
This plant may be available in these stores:
Due to the seasonal nature of plants, availability at your local garden center is not guaranteed. Give them a call before visiting.
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101 Market 8980 Quantrelle Ave. N.e.
Otsego, MN 55330 -
14th Street Garden Center 793 Jersey Ave.
Jersey City, NJ 07303 -
3rd Avenue Floral & Greenhouse 1110 3rd Ave. West
Dickinson, ND 58601
About Us
Monrovia grows beautiful plants for every region
We have been pioneers and craftsmen in the art of growing plants for nearly
100 years. Since our founding in Southern California by Harry E. Rosedale, Sr.
in 1926, we have been absolutely dedicated and obsessed with quality.
We have been pioneers and craftsmen in the art of growing plants for nearly 100 years. Since our founding in Southern California by Harry E. Rosedale, Sr. in 1926, we have been absolutely dedicated and obsessed with quality.