Magnolia × proctoriana (Proctoriana Magnolia)

Botanical Information

Species× proctoriana
SynonymsMagnolia stellata × salicifolia
TypeTree (deciduous)
OriginA cross between M. stellata and M. salicifolia.


USDA Hardiness Zone5 - 9
USDA Hardiness Ref.
Canadian Hardiness Zone6 - 8a
Canada Hardiness Ref.
RHS Hardiness ZoneH6
RHS Hardiness Ref.
Temperature (°C)- 30
Temperature (°F)- 20
Height4-8 metres
Spread4-8 metres

Description and Growing Information

General DescriptionDeciduous shrub reaching 8 m tall with rough brown or silvery grey bark, mid-green leaves and white, star-shaped spring flowers.
ShapeA conical, deciduous tree.
PropagationBy softwood or greenwood cuttings from late spring to early summer or by semi-hardwood cuttings from late summer to autumn.
CultivationGrow in moist, humus-rich, well-drained neutral to acid soil in sun or part shade with shelter from cold winds. Late frosts may damage flower buds.
PestsScale insects, coral spot, honey fungus and phytophthora root rot.
Leaf DescriptionAromatic, oval leaves, to 12 cm long, with pale undersides.
Flower DescriptionA star-shaped, white flower, up to 10 cm across, with 6- 12 petals.