It is excellent for use against the Colorado Beetle, Cabbage Aphids, Flour Beetle, Greenhouse White Flies, Spider Mites, to name a few. Please do your own reviews and research to satisfy any concerns. The Greeks may have been the first to cultivate this plant. Since the 1500’s it has been considered a necessary plant for most all gardens in Europe. In the 8th century it was grown in the gardens of Charlemagne and the Benedictine monks, of St. Gall, in Switzerland.