Hydrangea macrophylla
Bigleaf Hydrangea
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A small specimen shrub commonly used throughout landscapes, brilliant coloured flowers offer year around interest, often used for borders and cut flowers.
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Family |
Hydrangeaceae (Saxifragaceae) |
Genus |
Hydrangea |
Species |
macrophylla |
Category |
Woody |
Type |
Shrub (deciduous) |
Pronunciation |
USDA Hardiness Zone |
6-9b |
Canadian Hardiness Zone |
5a |
Temperature (°C) |
-10 |
Height |
2 m |
Spread |
2 m |
General Description |
A deciduous shrub that is fast growing, producing large round clusters of flowers. |
Landscape |
Can be used as a high quality flowing shrub border. May be placed in landscapes to add textural variety and colour. Planted in masses or groupings |
Cultivation |
Withstands high alkaline soils and is salt tolerant. It will flower blue on acidic soils and pink on alkaline soils. |
Shape |
Medium sized compact shrub, long un-branched stems, loose rounded form. |
Growth |
Fast |
ID Characteristic |
Large opposite leaves with serrated edges, medium to dark green. |
Pests |
Flower bud injury, leaf spot, powdery mildew, scales and mites |
Habitat |
Commonly found in areas of high rainfall, forest margins and coastal habitats. |
Bark/Stem Description |
Light brown in colour, dark brown exfoliating barks reveals new light brown bark, noticeable scars, dieback occurs in winter. |
Flower/Leaf Bud Description |
Buds are light green in colour and scaled. |
Leaf Description |
Opposite leaf with serrated edge, ovate in shape, 10 -20 cm long , fleshy and thick. |
Flower Description |
Large flat panicles, small fertile flowers throughout middle to large bracts around edges. |
Colour Description |
Leaves are dark green in colour, flowers can be blue, pink, or shades of purple depending on the pH levels in the soil. |
Texture Description |
Bark is rough, serrated leaves with rubbery feeling. |
Propagation |
From stem cuttings with use of rooting hormones, seeds, woody stem cuttings, air layering and softwood cuttings in early summer |