The growth and yield of potato (Solanum tuberosum L.) are considerably influenced by agronomic operations sowing dates as well as plant spacing. A field experiment was conducted during the Rabi season of 2025-26 at Shivalik Institute of Professional Studies, Dehradun. This experiment was laid out in a split-plot design having three sowing dates first 15th October second 1st November, and third 15th November) as a major plots and three spacing’s first 45 cm × 15 cm second 60 cm × 20 cm, and third 60 cm × 25 cm) as subplots. The findings of present study revealed that sowing on 1st November combined with 60 cm × 20 cm spacing recorded considerably higher plant height (72.4 cm), number of shoots per plant (5.8), and tuber yield (34.2 t/ha) as compared to remaining treatment. Early or late sowing of potato revealed that declines in yield due to adverse climatic circumstances during the time of tuber formation. Close spacing also increased competition between tubers that’s results reduces tuber size, while wider spacing increased tuber size however reduced the number of tubers per unit area. As a result, 1st November sowing along with plant spacing 60 cm × 20 cm is recommended for Dehradun conditions.

The results of the present investigation revealed that sowing on 1st November with plant spacing of 60 cm × 20 cm proved the most efficient treatment for potato cultivation under Dehradun region. This exact combination provided most favorable ecological as well as physiological conditions for the growth and yield of potato crop. The superior growth and yield parameters under this treatment emphasize its suitability for maximizing profitability from potato farming. Hence, the result of this study can serve as a realistic point for farmers and extension workers. Adoption of these recommendations may also contribute in sustainable and climate-resilient agriculture operations in similar agro-ecological zones. On the basis of study it is recommended that best Sowing Time of potato is around 1st November, Ideal Plant Spacing 60 cm × 20 cm is recommended. Additional studies could assess the performance of diverse potato varieties in recommended sowing time and spacing for better yield as well as sustainability.

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