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botanical name:
Mercurialis perennis
Mercurialis perennis © Deeproot Plant Base
common name:  Dog's Mercury, Bresych y Cwn
family:  Euphorbiaceae
characteristics: perennial, ground-cover
height: 0.30m
width: 0.60m
growth rate: fast
growth habit: erect
leaf colour: green
flower colour: white
main season: Spring
poison symbol poisonous or irritant
aspect: part shade, shade
conditions: moist soil, clay soil
preferred soil pH: alkaline
minimum temp: -15°C
USDA zone: 7 to 9
Perennial wildflower of woodlands and hedge bottoms with vigorously creeping, branching underground rhizomes. Emerges in early spring with short erect stems bearing opposite, pointed, finely toothed leaves. Sometimes forms extensive carpets of foliage. Spikes of small greenish-white flowers in spring, male and female on separate plants.

Moist, humus-rich soil in part or deep shade. Thrives in alkaline conditions. Can be invasive in gardens.

By seed or rhizome segments.

Sometimes encouraged to proved early carpeting foliaget in wooldland areas.

other notes:
Common native of Europe, including Britain.

The whole plant is toxic.
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