Plant Comfort Starter Sheets are great for starting seeds or cuttings. They come in a sheet of 98 cubes. The cubes are tapered to allow air movement between them and to allow for air pruning of roots to keep them easy to separate after your seedlings or cuttings take root. They have a small hole punched into them to place your seed or cutting. They fit in a standard propagation tray. They can be broken apart so that the whole sheet does not have to be used at one time. They are normally transplanted into grow rocks or larger rockwool blocks.