Hi Tulasi, You can keep the 'ginger paste' with out refregeration. Yes you can keep it out side, for more than a week. Provided you have to cook it properly. See that some oil is on the paste. If you are preparing more quantitiy and want to keep for more than a month then keep in the fridge. ok? You can make pachadi, thuvial, ginger murraba etc., by using ginger.