Today I walked passed my nasturtiums and noticed they were coated in a layer of black aphids. (See photo.) This made me happy.
Trap crops are a magnet for garden pests, but also attract beneficial bugs.
I was pleased to see the aphids were on my nasturtiums and not on my beans planted in the same bed. The nasturtium plant, with its bi-colored leaf and bright orange flowers, was more attractive to the aphid. Who would not find this plant attractive?
This is what these “attractive” plants do. They attract pests away from the “real crop” you are trying to grow.