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botanical name:
Hibiscus syriacus 'Diana'
Hibiscus syriacus 'Diana' © Deeproot Plant Base
common name:  Shrubby Mallow, Rose of Sharon
family:  Malvaceae
characteristics: shrub
height: 2.50m
width: 2.50m
growth rate: medium
growth habit: bushy
leaf colour: green
flower colour: white
main season: Summer
aspect: full sun
conditions: dry soil, moist soil, sandy soil
preferred soil pH: neutral-alkaline
minimum temp: -12°C
USDA zone: 7 to 9
description:
Very large, single, pure white ruffled flowers with wavy petal edges, from August to October.

cultivation:
Reasonably fertile, humus-rich, moist, well drained soil in full sun. Performs best in areas with long hot summers where it is likely to be hardier. Drought tolerant once established.
Prune in early spring. On established plants, some old stems can be cut back hard.

propagation:
From semi-hardwood cuttings

other notes:
Raised by Dr. Donald Egolf at the US National Arboretum, Washington, in 1963 and introduced in 1970.

RHS AGM

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