Land Cress
If you're tired of hungry little caterpillars eating through your brassica plants faster than you can harvest them you'll love Land Cress!
The University of Queensland has found Barbarea (Land Cress) to be a great companion herb to help control Cabbage Moth Caterpillars. Cabbage Moths find Landcress more attractive than cabbage or any other brassica plants and choose to lay their eggs in it's foliage. When the caterpillars hatch they eat the leaves of the Landcress and die, breaking the moth's lifecycle.