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botanical name:
Hydrangea macrophylla 'Hamburg'
Hydrangea macrophylla 'Hamburg' © Deeproot Plant Base
family:  Hydrangeaceae
characteristics: shrub
height: 2.00m
width: 2.50m
growth rate:
growth habit: bushy
leaf colour: green
flower colour: blue
main season: Summer
aspect: full sun, part shade, shade
conditions: moist soil, coastal
preferred soil pH: any
minimum temp: -23°C
USDA zone: 6 to 9
description:
Vigorous Hortensia type bearing large mopheads of deep pink to dark blue flowers with toothed sepals.

cultivation:
Moist, well drained, reasonably fertile, humus-rich soil. Sun or part shade, preferably with shelter from cold, drying winds. May become chlorotic on very shallow chalky soil. Performs well in seaside locations.
The flower colour is influenced by the soil pH; acid soil, with a pH of less than 5.5, will generally produce blue flowers. A pH above this tends to produce pink flowers, or in some cases neutral soils result in off-white flowerheads.

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