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the rabi season of the year 2017-18 to study the effect of different micronutrients and stage of their application on growth, yield and quality of cauliflower (Brassica oleracea var. botrytis). The experiment was laid out in Randomized Block Design with Factorial concept comprising of two factors. The first factor was stages of micronutrient application (S) i.e. s1 -at seedling stage (15 DAS), s2 -after transplanting (20 & 35 DAT) and s3 -at seedling stage (15 DAS) and after transplanting (20 & 35 DAT) and the second factor was micronutrients with eight levels viz., m0 -Zn 0 ppm + B 0 ppm + Mo 0 ppm, m1 -Zn 0 ppm + B 0 ppm + Mo 50 ppm, m2 -Zn 0 ppm + B 200 ppm + Mo 0 ppm, m3 -Zn 0 ppm + B 200 ppm + Mo 50 ppm, m4 -Zn 1000 ppm + B 0 ppm + Mo 0 ppm, m5 -Zn 1000 ppm + B 0 ppm + Mo 50 ppm, m6 -Zn 1000 ppm + B 200 ppm + Mo 0 ppm, m7 -Zn 1000 ppm + B 200 ppm + Mo 50 ppm. The treatments were replicated thrice. The individual effect of micronutrient application at different stages as well as their interaction effect on growth and quality of cauliflower cv. 'Pusa Snowball K 1' was recorded. The results indicate that micronutrient application at seedling stage (15 DAS) and after transplanting (20 & 35 DAT) gave maximum plant height at 20, 35 DAT and at harvest, leaf area at 45 DAT and a, b & total chlorophyll at 45 DAT. Higher dose of micronutrient application was found i.e. @ Zn 1000 ppm + B 200 ppm + Mo 50 ppm superior for growth parameters i.e. plant height at 20, 35 DAT and at harvest, leaf area at 45 DAT and a, b & total chlorophyll at 45 DAT. The interaction effect of stage of micronutrient application and micronutrients were found not significant for all parameters of growth and quality. Thus from the present investigation it could be concluded that for successful cultivation of cauliflower, micronutrient should spray at seedling stage (15 DAS) and 20 & 35 DAT for getting better growth. Micronutrients should applied @ Zn 1000 ppm + B 200 ppm + Mo 50 ppm for same.

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