Magnolia x loebneri 'Merrill' (Merrill Magnolia)


Botanical Information

FamilyMagnoliaceae
GenusMagnolia
Speciesx loebneri
Cultivar'Merrill'
CategoryWoody
TypeTree (deciduous)
OriginOriginated as a cross between M. kobus and M. stellata at the Arnold Arboretum, Massachusetts, United States of America around 1939.
Pronunciation

Details

USDA Hardiness Zone6b - 7a
USDA Hardiness Ref.
Canadian Hardiness Zone6
Canada Hardiness Ref.
RHS Hardiness ZoneH6
RHS Hardiness Ref.
Temperature (°C)-21 - (-15)
Temperature (°F)-5 - 5
Height5 m
Spread6 m
GrowthFast
Flowering PeriodMay

Description and Growing Information

ID CharacteristicFrail stems holding oblong leaves, topped with small white flowers.
ShapeLarge, pyramidal to rounded crown.
LandscapeInformal gardens and container plants.
PropagationSoftwood or semi-hardwood cuttings.
CultivationGrown in partial shade to full sun, in well-drained neutral to acidic soils.
PestsSnails, scale and capsid bug.
Notable SpecimensThe Mac Cuddy Botanic Gardens, Strathroy, Ontario, Canada.
HabitatHorticultural origin.
Bark/Stem DescriptionSmooth glabrous stems with slightly significant lenticels. Mature bark is more coarse but fragile and susceptible to machinery damage.
Flower/Leaf Bud DescriptionThe terminal flower buds are extremely tomentose, are two-scaled and measure 2 - 5 cm in length. Vegetative buds are 1/4 the size of flower buds.
Leaf DescriptionSimple, alternate oblong-pinnate leaves up to 8 cm long.
Flower DescriptionFragrant white flowers.
Colour DescriptionCharacteristically porcelain white flowers with medium to dark green foliage. Dark brown to greyish brown bark.
Texture DescriptionMedium.

Photographs