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Bastard Cabbage seeds germinate early in the late fall or early winter and quickly cover the ground with a blanket of leafy rosettes (circles of leaves at ground level). These dense rosettes block sunlight from reaching seeds and seedlings of native plants. In some places it forms a monoculture (a vegetative cover of mostly one species). Annual Bastard Cabbage has long been established on agricultural fields, roadsides, and disturbed lands and is becoming invasive in natural areas such as open forests and along streams.
You may not want or need to replace this invasive plant, but if you do, options are listed below.
For information on how to eradicate this invasive, view our statement on herbicide use and preferred alternatives for invasive plants.