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botanical name:
Magnolia x loebneri 'Merrill'
Magnolia x loebneri 'Merrill' © Deeproot Plant Base
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synonyms:  Magnolia x loebneri 'Doctor Merrill'
family:  Magnoliaceae
characteristics: tree, scented/aromatic
height: 10.00m
width: 8.00m
growth rate: medium
growth habit: broad headed
leaf colour: green
flower colour: white
main season: Spring
aspect: full sun, part shade
conditions: moist soil, clay soil
preferred soil pH: neutral-acid
minimum temp: -12°C
USDA zone: 8 to 9
Vigorous, spreading, small spreading tree which freely produces large, fragrant, white flowers in early spring.

Not too fussy about soil, moist, reasonably fertile, humus-rich, acid to neutral soil is ideal. Will thrive in heavy clay and tolerant of atmospheric pollution. Best with some protection from strong winds, in sun or part shade. Flower buds may suffer damage from hard frosts.
If required, prune unwanted or crossing branches when dormant in autumn or late winter to very early spring.

other notes:
Hybrid of Magnolia kobus and Magnolia stellata, raised by Dr. Karl Sax at the Arnold Arboretum, Boston, Massachusetts, in 1939 and named after a former director, Prof. Elmer Merrill.
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