Butter beans (Phaseolus lunatus) are prized for their significant nutraceutical benefits, which are crucial in addressing malnutrition in developing countries. Given their nutritional advantages, global cultivation demand is increasing. This study aims to boost production and improve crop quality through effective agronomic practices. To minimize dependence on synthetic chemicals, the study investigates the use of biostimulants as an alternative, offering a promising method for enhancing crop growth and performance. The experiment took place under 2 different conditions: polyhouse (G1) and open field condition (G2) at Horticultural and Forestry Research Station, Kodaikanal, from December 2023 to June 2024. Various biostimulants were applied in foliar parts in different doses: control (B1) seaweed extract at 3 % (B2) and 5 % (B3), panchagavya at 3 % (B4) and 5 % (B5), vermiwash at 5 % (B6) and 10 % (B7) and fulvic acid at 6 g/L (B8) and 9 g/L (B9), each replicated 3 times. Among the treatment combinations, G1B3 (seaweed extract 5 % under polyhouse condition) was most effective in all growth, yield and quality parameters including days to first flower emergence (48.50 days), number of pods per plant (96.33), pod yield (4.98 t/ha), highest soluble protein (37.36 %) than G2B1 (control group under open field condition). It resulted in a greater number of days for flower emergence (57.85 days), lowest values in number of pods per plant (69.91), pod yield (2.96 t/ha) and soluble protein (24.69 %). These findings suggest that seaweed extract has great potential as a sustainable agricultural input, enhancing productivity and crop performance in butter bean cultivation. The main goals were to investigate how different biostimulants and growing conditions affect the growth and yield of butter beans and to identify effective organic growth promoters that could improve the yield and quality of butter bean crops in various growing environments. The results of this study are discussed in the following sections.
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