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Perennial Ryegrass Grown For Seed (Western Oregon) Nutrient Management Guide

John Hart, Nicole Anderson, Thomas Chastain, M. Flowers, C. Ocamb, M. Mellbye and, William Young III (November, 2013)

Summary

Perennial ryegrass is a short-lived, cool-season perennial bunchgrass with a shallow, fibrous root system. Cool, moist winters and warm, dry summers of the Pacific Northwest (PNW) are suitable for seed production of many crops, including perennial ryegrass and other cool-season grass species. The PNW currently produces about 85 percent of the perennial ryegrass seed used in the United States and about 40 percent of the world supply.