Piet's planting plans and plant lists are not secret, unlike with most other designers; he publishes them both in books and online. Piet is surprisingly relaxed about the possibility that others might copy him, saying they are welcome to do so. But by the time any given design has been completed, Piet has long since moved on in his creative thoughts and visions, and never reuses exactly the same combination of plants.
His real achievement is in elevating the work of designing with plants to a whole new level. He has brought perennials back into the consciousness of landscape
