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Garlic mustard (Alliaria petiolata) is starting to emerge in the Rogue Basin. This fast-spreading invader can be identified by white four-petaled flowers with alternate, triangular to heart-shaped leaves, that have scalloped edges and give off an odor of garlic when crushed. It can grow in full sun to full shade, making it extremely adaptable. Each plant can produce up to 5,000 seeds which can remain in the soil for up to ten years. Garlic mustard can be difficult to control. Small patches can be removed by hand in early spring before they flower. If you think you have found this plant, please report it to RBP immediately.