Yn 2013, llwyddodd Ystâd y Goron i luosogi coeden wreiddiol Derw Pontfadog a phlannu coeden ym Mharc Mawr Windsor, sy'n parhau i fod ar yr ystâd.
In 2013, The Crown Estate successfully managed to propagate the original Pontfadog Oak tree and plant a tree in Windsor Great Park, which remains on the estate.