Purple Nutsedge

Purple nutsedge is considered one of the world’s worst weeds and has become problematic in parts of California, but is not yet known in Oregon. This invasive sedge spreads aggressively through underground tubers (nutlets), making it extremely difficult to eradicate once established. It thrives in disturbed soils, agricultural fields, gardens, and landscaped areas, where it competes heavily with crops and native plants for water, nutrients, and light. Infestations can quickly reduce crop yields and disrupt restoration efforts, as even small fragments of tubers can regenerate into new plants. Because of its resilience and persistence, purple nutsedge poses a serious threat for Oregon landowners and land managers. If you believe you have found purple nutsedge, please report it to the Oregon Invasives Hotline.