An experiment was conducted during 2016–17 at Department of Fruit Crops, Horticultural College and Research Institute, Periyakulam for determining the age of rootstock for grafting in jackfruit by softwood grafting method. Experiment was laid out on Factorial Completely Randomized Design (FCRD) with three replications. Growth parameters like days taken for graft union, graft success (%), days taken for sprouting, number of sprouts, length of sprouts (cm), plant height (cm), girth of rootstock (cm), girth of scion (cm), number of leaves, leaf length (cm), breadth of leaf (cm), leaf area (cm2), graft survival (%) at 30, 60 and 90 days after grafting were recorded. | Effect of different age of rootstock on grafting of jackfruit Artocarpus heterophyllus L.