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botanical name:
Erysimum dubium
Erysimum dubium © Deeproot Plant Base
common name:  Perennial wallflower
family:  Brassicaceae
characteristics: perennial, evergreen, ground-cover
height: 0.20m
width: 0.35m
growth rate: medium
growth habit: mounding
leaf colour: dark green
flower colour: yellow
main season: Spring
poison symbol poisonous or irritant
aspect: full sun
conditions: dry soil, sandy soil
preferred soil pH: alkaline
minimum temp: -29°C
USDA zone: 5 to 9
Evergreen mat forming perennial with small narrow, dark green leaves. Clusters of bright yellow flowers in spring.

Sharply drained, preferably poor, alkaline, soil in full sun. Fully Hardy rock garden plant.

other notes:
From the European Alps.
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