Philosophising in the Shadow of Trees

When gathering his students outside the Academy, did Plato urge them to sit in the shade of (already) ancestral olive trees or did he urge them to stand in-between the shadow of its imposing columns? Apart from the Buddha, longing for spiritual experience under a Bodhi tree, philosophers do not seem to lift their heads to admire these mute witnesses of historical events and by-gone generations. And yet, the first (possibly philosophical) conversations of our remote ancestors took place in ...