The high biological value of the walnut kernel makes it an indispensable food product and that is why the walnut is on the FAO priority plants list. Therefore, only varieties with proven high nutritive value and good agro-economical indexes have to be propagated. Walnut (Juglans regia L.) propagation is more difficult, compared to most fruit species, that is why along with the work on new methods for the production of inoculate planting material, old and reliable propagation technologies are being improved Worldwide. Tongue grafting methods with different timings was compared under controlled poly house conditions and field conditions using different selections of Persian walnut (Juglans regia L.) during 2013 and 2014 in Dry Land Krewa Agriculture Research Station Budgam. Controlling temperature and humidity in a greenhouse improved grafting success in all methods compared with results under field conditions. Hence this study was carried out during two successive seasons (2013 and 2014) on two-years-old walnut rootstocks under zero energy poly houses and open field conditions. Grafting was done by tongue grafting on five dates i.e. viz. 10th January, 20th January, 30st January,10th February, 20th February under poly house conditions in walnut and the same experiment was repeated under field conditions with same methods of grafting but with three different timings viz. 1st March, 11th March, 21st March, 31st March, and 11th April. The two year data showed that, highest success percentage of grafting was obtained on 21st January and lowest was recorded on 21st February under zero energy poly house while as grafting success was comparatively quite low in case of field conditions. The maximum number of shoots/scion and leaves/scion was observed on 30th January. The highest value for scion diameter (0.95cm) was found on seedlings grafted on 30th January while as lowest scion diameter of 0.46 cm on grafts of 1st March. The highest proportion of salable plants was observed on 30th January under poly house conditions and lowest proportion of salable plants was recorded on 1st March under open field conditions. The higher grafting success recorded could be due to the favorable temperature and relative humidity at the time of grafting and rapid flow of sap in stock and scion that might have favored the healing process and established the continuity of cambial and vascular tissues for the graft take. Significant effects were also noticed on number of shoots, number of leaves, scion diameter and number of salable plants.

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