A field experiment was carried out to evaluate the ideal planting dates and harvesting stage of peppermint varieties to produce higher herb and essential oil yield of peppermint during two consecutive spring seasons of 2019 and 2020 at two locations viz. Ludhiana and Bathinda. The experiment in split plot design contained the combinations of two varieties (Local and ‘Kukrail’) and three dates of planting (January 15, January 30 and February 15) in the main plots and three harvesting schedules [120, 130 and 140 days after planting(DAP)] in sub plots. The late planting of peppermint varieties on Feb 15 significantly enhanced growth and development of crop in relation to significantly higher dry matter accumulation and leaf area index; the key contributing attributes to herb and oil yield of crop irrespective of the agro-climatic conditions of two different locations. However, Feb 15 planted crop produced significantly higher herb yield than Jan 15 planting while statistically at par with Jan 30 planting. In addition to it, harvesting the peppermint varieties at 140 DAP indicated significantly higher herb yield by 16.3 and 31.2% than 130 and 120 DAP respectively under Ludhiana conditions and similarly, by 11.3 and 20.2% respectively at other prescribed location.