Magnolia campbellii 'Sir Harold Hillier' (Sir Harold Hillier Magnolia)
Botanical Information
Family | Magnoliaceae |
Genus | Magnolia |
Species | campbellii |
Cultivar | 'Sir Harold Hillier' |
Category | Woody |
Type | Tree (deciduous) |
Origin | A beautiful hybrid with huge pure white flowers. The original tree grows at Chyverton Gardens in Cornwall, United Kingdom. |
Details
USDA Hardiness Zone | 9 |
USDA Hardiness Ref. | |
Canadian Hardiness Zone | Requires cold season protection under glass. |
Canada Hardiness Ref. | |
RHS Hardiness Zone | H4 - H3 |
RHS Hardiness Ref. | |
Temperature (°C) | (-4) - (-1) |
Temperature (°F) | 25 - 30 |
Height | 8 m |
Spread | 5 - 6 m |
Growth | Medium |
Flowering Period | March, April |
Description and Growing Information
Shape | Grows to be broadly conical. |
Cultivation | Grow in a sunny situation in humus-rich, moist, free-draining soil that is slightly acidic. |
Pests | scale insects, honey fungus, coral spot. |
Notable Specimens | Chyverton Gardens, Cornwall, United Kingdom. Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom. |
Bark/Stem Description | Twigs are yellow-green, later grey to ochre. |
Leaf Description | Leaves to 23 x 11 cm, dark green above and pale green beneath. |
Flower Description | Pure white cup and saucer shaped flowers that may measure up to 30 cm wide. |
Fruit Description | Cones to 15 cm. |
Photographs
![Magnolia campbellii 'Sir Harold Hillier', form, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom. Magnolia campbellii 'Sir Harold Hillier', form, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom.](photos/Magnolia-campbellii-Sir-Harold-Hillier-tren-frm1.jpg)
Magnolia campbellii 'Sir Harold Hillier', form, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom.
![Magnolia campbellii 'Sir Harold Hillier', bark, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom. Magnolia campbellii 'Sir Harold Hillier', bark, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom.](photos/Magnolia-campbellii-Sir-Harold-Hillier-tren-bk1.jpg)
Magnolia campbellii 'Sir Harold Hillier', bark, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom.
![Magnolia campbellii 'Sir Harold Hillier', flower bud, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom. Magnolia campbellii 'Sir Harold Hillier', flower bud, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom.](photos/Magnolia-campbellii-Sir-Harold-Hillier-tren-bd1.jpg)
Magnolia campbellii 'Sir Harold Hillier', flower bud, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom.