Background: For effective breeding programs and farm management, it is essential to understand and account for these non-genetic influences.&nbsp;This study focuses on impact of period and season of birth, sex of lamb and parity of dam on growth traits of Corriedale sheep under agro climatic condition of Kashmir. 
 
Methods: The data on growth traits of 5492 corriedale sheep under MRCSG (Mountain Research Centre for Sheep and Goat) at SKUAST-K (India) during 37 years (1988-2024) were analysed using fixed linear model via emmeans package in R. The data was organized into several sub-classes based on period of birth, season of birth, parity and sex of animal. 
 
Result: The overall least-squares means for birth weight (BW), weaning weight (WW), six-month weight(6M), nine-month weight and yearling weight (12M) was estimated as 3.55&plusmn;0.04, 11.31&plusmn;0.27, 17.76&plusmn;0.30, 18.88&plusmn;0.17 and 22.97&plusmn;0.34 respectively. Period, season of birth, sex and parity had significant effect (P&lt;0.01) on growth traits under study. Post weaning body weights exhibited consistent improvement over the periods indicating better management practices. Male lambs and winter-born lambs showed superior growth. Ewes in 4th&nbsp;to 5th&nbsp;parity gave birth to heavy lambs as compared to other parities. The study underlines the importance of accounting for these non-genetic factors in the efficient management and selection decisions at the farm. 
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Impact of Non-genetic Factors on Growth Traits in Corriedale Sheep under Agro Climatic Condition of Kashmir