How do You find flowers in Oblivion

It depends on what kind of flower you are talking about. If it just a planter, then you can find them on graves and in most houses. If you are talking about ingredients (loose), then you can find them in caves and you can also buy them from Alchemists and Alchemy shops. But if you are talking about ingredients( on plant), then you can find them anywhere, depending on the type of flower/plant.