The required Samagri is standard for Shradh: rice flour, barley flour (Jau), black sesame seeds (kala til), Kusha grass, flowers, Tulsi leaves, honey, milk, ghee, fruits, incense, lamp, etc.
You do not need to worry about sourcing these. All necessary puja materials are readily available in shops near the Sangam area and the main ghats. Often, the Pandit you hire will arrange for the Samagri as part of their service package.
