Cosmos are effective nectaries for butterflies and can be planted to attract pollinators and other beneficial insects such as syrphid flies, lacewings and parasitic wasps. Cosmos are also said to repel the corn earworm. As a companion plant, scatter seeds at plot edges, or plant at intervals...
Cosmos are an annual, semi-hardy herb up to 2 m tall with bright orange or yellow flowers generally used as an ornamental. Cosmos are also effective nectaries for butterflies, and can be planted to attract pollinators and other beneficial insects such as syrphid flies, lacewings, and parasitic...