Fertilization is part of the overall management of peppermint and spearmint that includes planting of disease-resistant varieties, selection of appropriate soils, irrigation, timely harvest, and control of diseases, weeds, insects, and nematodes. Other OSU publications cover pest control on peppermint (see page 4). Crop response to fertilizer may differ with...
Because irrigation can overcome reliance on rainfall, in the past 40 years the majority of peppermint acreage has moved to irrigated regions of the Pacific Northwest.