Although they can be grown in semi-shade they prefer full sun, when they will flower with more vigor. When planted in a sunny position they will flower in the early spring and are able to tolerate the cold weather and are mature plant cold hardy at least to 30s F (Zone: 9-11).
Erysimum shrubs range in size from 2-5 feet tall and 1-2 feet wide and will spread and fill open areas. They require regular water and are relatively drought tolerant. While they are excellent for low maintenance landscapes, they do require occasional trimming to maintain the desired shape.
For growing Erysimum in pots, a well drained soil mix is required. When the weather starts to cool, smaller pots must be brought in and placed in a bright sunny location indoors and be sure to remove any dead leaves. In cold regions, these pots must be sheltered from strong winds, preferably placed in a frost free shed or garage.
Erysimum sp. is a great choice for adding beauty and color to the garden. Not only do they attract butterflies and hummingbirds, they also bloom in a variety of colors including pink, blue, lavender and purple, red, crimson and vinous, and yellow and orange which can brighten up any landscape.