ST. MARY MAGNOLIA
Magnolia grandiflora 'St. Mary'
FAMILY Magnoliaceae
SYNONYMS
ADDITIONAL COMMON NAMES
See: all Magnolia
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by M. Ritter, J. Reimer
GENERAL INFO
Blooms at a young age.
Native range: Southeastern United StatesHorticultural use: Screen or Espalier
Native range: Southeastern United StatesHorticultural use: Screen or Espalier
TREE CHARACTERISTICS
Tree Shape: RoundedFoliage Type: EvergreenMaximum Tree Height: 25 feetCanopy Width: 15-20 feetGrowth Rate: ~24 in/yearLeaf Arrangement and Leaf Form: Alternate, SimpleLeaf Shape: OvalLeaf color: Dark GreenFlowers: Showy, FragrantFlower Color: WhiteFlower Type: Has male and female reproductive parts in each flower (perfect)Flower Time: Fall, Spring or SummerFruit: Very Large Brown or Purple FollicleFruiting time: Fall or SummerBark Color: Light Green, FissuredLitter Type: Dry Fruit, Leaves, Flowers
SITE CONDITIONS
Recommended Planting Area: 4' to 7'Water Use Rating: MediumSunset Climate Zone: 4 - 12, 14 - 24Shade Tolerance: NoSoil Texture: Loam or Sand or ClaySoil pH: Very Acidic to Slightly AlkalineSalt Tolerance: ModerateWind Resistance: Highest
CONSIDERATIONS
Branch Strength: MediumRoot Damage Potential: LowPotential health issues: No known hazardsWildlife interactions: Attracts birdsDisease and Pest susceptibility: Armillaria, Root Rot, Verticillium and Invasive Shot Hole Borer, Aphids, Scales, Spider MitesUtility Friendly: Yes
External Resources
CITE THIS TREE
"SelecTree. UFEI. "Magnolia grandiflora 'St. Mary' Tree Record." 1995-2025. Cal
Poly State University, San Luis Obispo. Accessed on Jul 22, 2025."
< https://selectree.calpoly.edu/tree-detail/855 >
< https://selectree.calpoly.edu/tree-detail/855 >
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