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botanical name:
Mahonia aquifolium
Mahonia aquifolium © Deeproot Plant Base
common name:  Oregon Grape, Blue Barberry
synonyms:  Berberis aquifolium
family:  Berberidaceae
characteristics: shrub, evergreen, ground-cover
height: 1.20m
width: 1.50m
growth rate: medium
growth habit: bushy
leaf colour: dark green
flower colour: yellow
fruit colour: blue
main season: All Year
medicinal symbol medicinal
aspect: full sun, part shade, shade
conditions: moist soil, clay soil, sandy soil
preferred soil pH: any
minimum temp: -25°C
USDA zone: 5 to 9
Glossy green leaves turn purple in cold winter weather. Yellow flower clusters followed by the blue-black berries which give its common name. Very tough and good in shade.

Tolerant of a wide range of conditions but best in moist, well drained, moderately fertile, humus-rich soil in full or part shade.
If required, trim or cut back after flowering. Can be pruned hard to rejuvenate.

The roots have been used mediccinally to treat liver, gall-bladder and skin problems

other notes:
Native to western North America, from Alaska to California.
Official state flower of Oregon, USA.
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