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A field experiment was conducted on clay soils of Regional Agricultural Research Station, Guntur during kharif 2010-2011 and 2011-2012 to know the influence of weather parameters on growth and yield of kharif Bt cotton grown under varying dates of sowings in Krishna agro climatic zone of Andhra Pradesh. Results indicated that the maximum rainfall (534,4 mm) received by crop sown on 2nd July and lowest received crop sown on 1st of October. Due to variation in dates of sowings, plant height, monopodia and sympodia, bolls/plant, boll weight, dry matter production and yield were affected greatly. Average plant height (91 cm), monopodia (2) and sympodia (19) bolls/plant (44). boll weight (44 g/10 bolls), dry matter production (783 g.m2) and yield (2510 kg) was highest in crop sown on 2nd July and was lowest in crop sown on 1st of October, respectively. Correlation coefficient between growth, yield and its …