Avocado Propagation Cone in Stained Glass | PidegoArtAvocado Propagation Cone in Stained Glass ROKU Grow beautiful avocado or plants with PidgoArts stained glass propagation plate instead of poking it with toothpicks! I have come up with this design ROKU (means Six in Japanese) as I use 6 separate glass pieces together into a hex funnel shape. I have combined some colours to suit any space. It is so fascinating that Avocado pits I used to chuck in a bin can bring me so much happiness and smiles, so hope