In 1923, Professor Albert Einstein started a Technion-Nobel tradition when he planted a palm tree at the Israel Technion’s original campus. Since 2007, all visiting Nobel laureates are invited to plant a tree in Technion’s Lokey Park. For Tu Bishvat here is a video of several Nobel Prize winners doing just that.
http://www.youtube.com/watch?v=B217Be1vfR4&feature=youtu.be