You must have BATHTUB and PAINTING: DINK DUCK to make RUBBER DUCKY. You can find this item in misc blocks category. Less than hour this seed takes to grow. Breaking RUBBER DUCKY gives you 5 experinece points per tree and block you brake. There is no data about durability. Oops, there is no entry in the database about seedratio. If you know something, please share. There is no data about gemratio. Currently we do not yet have knowledge about the blockratio of RUBBER DUCKY.