Hydrangea macrophylla
Bigleaf Hydrangea
"
A small specimen shrub commonly used throughout landscapes, brilliant coloured flowers offer year around interest, often used for borders and cut flowers.
"
| 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 |