This is one of the most beautiful things I ever saw, which every Bodhi tree gives so much, daily (Pippal its other name, or "Buddha Tree" somewhere). As old tradition to do that remains only in India, we advice "eternal-alike" option - to soak the leaves in a water for some long time.
Story of Buddha describing the importance of Boddhi - Pippal tree. Gautama pre-Buddha was meditating at the cave for the very long time. He was almost dying, staying there without any food for the weeks, when Buddha moved-out to find new - ultimate - place to complete his Path or pass-away from this world. Blessed women met him and feed him by rice with ghee. Then Tathagata found a very old beautiful Bodhi tree, perfectly suited for his search. This was a place of His Nirvana - under this Bodhi tree Buddha achieved full Enlightenment.
FInd more info about Bodhi: photos at the Tree Galleries, interesting facts about island Bodhi, and info about Bodhi on Russian - о дереве Бодхи, Ашваттха или Пиппал.